doc: add diagram for receiving from external SMTP servers

Co-authored-by: missytake <missytake@systemli.org>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Report something that isn't working.
+title: ''
+assignees: ''
+
+---
+
+<!--
+Please fill out as much of this form as you can (leaving out stuff that is not applicable is ok).
+-->
+
+- Server OS (Operating System) - preferably Debian 12: 
+- On which OS you run cmdeploy:
+- chatmail/relay version: `git rev-parse HEAD`
+
+## Expected behavior
+
+*What did you try to achieve?*
+
+## Actual behavior
+
+*What happened instead?*
+
+### Steps to reproduce the problem:
+
+1. 
+2.
+
+### Screenshots
+
+### Logs
+

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: true

.github/workflows/ci.yaml

@@ -10,6 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        # Checkout pull request HEAD commit instead of merge commit
+        # Otherwise `test_deployed_state` will be unhappy.
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: run chatmaild tests 
         working-directory: chatmaild

.github/workflows/docs-preview.yaml

@@ -0,0 +1,80 @@
+name: documentation preview
+
+on:
+  pull_request:
+    paths:
+      - 'doc/**'
+      - 'scripts/build-docs.sh'
+      - '.github/workflows/docs-preview.yaml'
+
+jobs:
+  scripts:
+    name: build 
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: initenv 
+        run: scripts/initenv.sh
+
+      - name: append venv/bin to PATH
+        run: echo `pwd`/venv/bin >>$GITHUB_PATH
+
+      - name: build documentation 
+        working-directory: doc
+        run: sphinx-build source build
+
+      - name: build documentation second time (for TOC)
+        working-directory: doc
+        run: sphinx-build source build
+
+      - name: Get Pullrequest ID
+        id: prepare
+        run: |
+          export PULLREQUEST_ID=$(echo "${{ github.ref }}" | cut -d "/" -f3)
+          echo "prid=$PULLREQUEST_ID" >> $GITHUB_OUTPUT
+          if [ $(expr length "${{ secrets.USERNAME }}") -gt "1" ]; then echo "uploadtoserver=true" >> $GITHUB_OUTPUT; fi
+      - run: |
+          echo "baseurl: /${{ steps.prepare.outputs.prid }}" >> _config.yml
+
+      - name: Upload preview
+        run: |
+          mkdir -p "$HOME/.ssh"
+          echo "${{ secrets.CHATMAIL_STAGING_SSHKEY }}" > "$HOME/.ssh/key"
+          chmod 600 "$HOME/.ssh/key"
+          rsync -rILvh -e "ssh -i $HOME/.ssh/key -o StrictHostKeyChecking=no" $GITHUB_WORKSPACE/doc/build/ "${{ secrets.USERNAME }}@chatmail.at:/var/www/html/staging.chatmail.at/doc/relay/${{ steps.prepare.outputs.prid }}/"
+
+      - name: "Post links to details"
+        id: details
+        if: steps.prepare.outputs.uploadtoserver
+        run: |
+          # URLs for API connection and uploads
+          export GITHUB_API_URL="https://api.github.com/repos/chatmail/relay/statuses/${{ github.event.after }}"
+          export PREVIEW_LINK="https://staging.chatmail.at/doc/relay/${{ steps.prepare.outputs.prid }}/"
+          export STATUS_DATA="{\"state\": \"success\", \
+                               \"description\": \"Preview the changed documentation here:\", \
+                               \"context\": \"Documentation Preview\", \
+                               \"target_url\": \"${PREVIEW_LINK}\"}"
+          curl -X POST --header "Accept: application/vnd.github+json" --header "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" --url "$GITHUB_API_URL" --header "content-type: application/json" --data "$STATUS_DATA"
+
+          #check if comment already exists, if not post it
+          export GITHUB_API_URL="https://api.github.com/repos/chatmail/relay/issues/${{ steps.prepare.outputs.prid }}/comments"
+          export RESPONSE=$(curl -L --header "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" --url "$GITHUB_API_URL" --header "content-type: application/vnd.github+json" -H "X-GitHub-Api-Version: 2022-11-28")
+          echo $RESPONSE > response
+          grep -v '"Check out the page preview at https://staging.chatmail.at/doc/relay' response && echo "comment=true" >> $GITHUB_OUTPUT || true
+      - name: "Post link to comments"
+        if: steps.details.outputs.comment
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "Check out the page preview at https://staging.chatmail.at/doc/relay/${{ steps.prepare.outputs.prid }}/"
+            })
+
+      - name: check links 
+        working-directory: doc
+        run: sphinx-build --builder linkcheck source build
+

.github/workflows/docs.yaml

@@ -0,0 +1,44 @@
+name: build and upload documentation
+
+on:
+  push:
+    branches:
+      - main
+      - 'missytake/docs-ci'
+    paths:
+      - 'doc/**'
+      - 'scripts/build-docs.sh'
+      - '.github/workflows/docs.yaml'
+
+jobs:
+  scripts:
+    name: build 
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: initenv 
+        run: scripts/initenv.sh
+
+      - name: append venv/bin to PATH
+        run: echo `pwd`/venv/bin >>$GITHUB_PATH
+
+      - name: build documentation 
+        working-directory: doc
+        run: sphinx-build source build
+
+      - name: build documentation second time (for TOC)
+        working-directory: doc
+        run: sphinx-build source build
+
+      - name: check links 
+        working-directory: doc
+        run: sphinx-build --builder linkcheck source build
+
+      - name: upload documentation
+        run: |
+          mkdir -p "$HOME/.ssh"
+          echo "${{ secrets.CHATMAIL_STAGING_SSHKEY }}" > "$HOME/.ssh/key"
+          chmod 600 "$HOME/.ssh/key"
+          rsync -rILvh -e "ssh -i $HOME/.ssh/key -o StrictHostKeyChecking=no" $GITHUB_WORKSPACE/doc/build/ "${{ secrets.USERNAME }}@chatmail.at:/var/www/html/chatmail.at/doc/relay/"
+

.github/workflows/staging-ipv4.testrun.org-default.zone

@@ -17,5 +17,4 @@ $TTL 300
 ;; DNS records.
 @       IN      A       37.27.95.249
 mta-sts.staging-ipv4.testrun.org.    CNAME   staging-ipv4.testrun.org.
-iroh.staging-ipv4.testrun.org.       CNAME   staging-ipv4.testrun.org.
 www.staging-ipv4.testrun.org.        CNAME   staging-ipv4.testrun.org.

.github/workflows/staging.testrun.org-default.zone

@@ -17,6 +17,5 @@ $TTL 300
 ;; DNS records.
 @       IN      A       37.27.24.139
 mta-sts.staging2.testrun.org.    CNAME   staging2.testrun.org.
-iroh.staging2.testrun.org.       CNAME   staging2.testrun.org.
 www.staging2.testrun.org.        CNAME   staging2.testrun.org.
 

.github/workflows/test-and-deploy-ipv4only.yaml

@@ -20,7 +20,7 @@ jobs:
       group: ci-ipv4-${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: ${{ !contains(github.ref, '$GITHUB_REF') }}
     steps:
-      - uses: jsok/serialize-workflow-action@v1
+      - uses: jsok/serialize-workflow-action@515cd04c46d7ea7435c4a22a3b4419127afdefe9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - uses: actions/checkout@v4
@@ -38,8 +38,8 @@ jobs:
           if [ -f dkimkeys-ipv4/dkimkeys/opendkim.private ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" dkimkeys-ipv4 root@ns.testrun.org:/tmp/ || true; fi
           if [ "$(ls -A acme-ipv4/acme/certs)" ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" acme-ipv4 root@ns.testrun.org:/tmp/ || true; fi
           # make sure CAA record isn't set
-          scp .github/workflows/staging-ipv4.testrun.org-default.zone root@ns.testrun.org:/etc/nsd/staging-ipv4.testrun.org.zone
+          scp -o StrictHostKeyChecking=accept-new .github/workflows/staging-ipv4.testrun.org-default.zone root@ns.testrun.org:/etc/nsd/staging-ipv4.testrun.org.zone
-          ssh -o StrictHostKeyChecking=accept-new root@ns.testrun.org sed -i '/CAA/d' /etc/nsd/staging-ipv4.testrun.org.zone
+          ssh root@ns.testrun.org sed -i '/CAA/d' /etc/nsd/staging-ipv4.testrun.org.zone
           ssh root@ns.testrun.org nsd-checkzone staging-ipv4.testrun.org /etc/nsd/staging-ipv4.testrun.org.zone
           ssh root@ns.testrun.org systemctl reload nsd
 
@@ -49,7 +49,7 @@ jobs:
             -H "Authorization: Bearer ${{ secrets.HETZNER_API_TOKEN }}" \
             -H "Content-Type: application/json" \
             -d '{"image":"debian-12"}' \
-            "https://api.hetzner.cloud/v1/servers/${{ secrets.STAGING_SERVER_ID }}/actions/rebuild"
+            "https://api.hetzner.cloud/v1/servers/${{ secrets.STAGING_IPV4_SERVER_ID }}/actions/rebuild"
 
       - run: scripts/initenv.sh
 
@@ -63,16 +63,13 @@ jobs:
           while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new -v root@staging-ipv4.testrun.org id -u ; do sleep 1 ; done
           ssh -o StrictHostKeyChecking=accept-new -v root@staging-ipv4.testrun.org id -u
           # download acme & dkim state from ns.testrun.org
-          rsync -e "ssh -o StrictHostKeyChecking=accept-new" -avz root@ns.testrun.org:/tmp/acme-ipv4 acme-restore || true
+          rsync -e "ssh -o StrictHostKeyChecking=accept-new" -avz root@ns.testrun.org:/tmp/acme-ipv4/acme acme-restore || true
-          rsync -avz root@ns.testrun.org:/tmp/dkimkeys-ipv4 dkimkeys-restore || true
+          rsync -avz root@ns.testrun.org:/tmp/dkimkeys-ipv4/dkimkeys dkimkeys-restore || true
           # restore acme & dkim state to staging2.testrun.org
-          rsync -avz acme-restore/acme-ipv4/acme root@staging-ipv4.testrun.org:/var/lib/ || true
+          rsync -avz acme-restore/acme root@staging-ipv4.testrun.org:/var/lib/ || true
-          rsync -avz dkimkeys-restore/dkimkeys-ipv4/dkimkeys root@staging-ipv4.testrun.org:/etc/ || true
+          rsync -avz dkimkeys-restore/dkimkeys root@staging-ipv4.testrun.org:/etc/ || true
           ssh -o StrictHostKeyChecking=accept-new -v root@staging-ipv4.testrun.org chown root:root -R /var/lib/acme || true
 
-      - name: run formatting checks 
-        run: cmdeploy fmt -v 
-
       - name: run deploy-chatmail offline tests 
         run: pytest --pyargs cmdeploy 
 
@@ -80,7 +77,7 @@ jobs:
           cmdeploy init staging-ipv4.testrun.org
           sed -i 's#disable_ipv6 = False#disable_ipv6 = True#' chatmail.ini
 
-      - run: cmdeploy run
+      - run: cmdeploy run --verbose --skip-dns-check
 
       - name: set DNS entries
         run: |

.github/workflows/test-and-deploy.yaml

@@ -20,7 +20,7 @@ jobs:
       group: ci-${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: ${{ !contains(github.ref, '$GITHUB_REF') }}
     steps:
-      - uses: jsok/serialize-workflow-action@v1
+      - uses: jsok/serialize-workflow-action@515cd04c46d7ea7435c4a22a3b4419127afdefe9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - uses: actions/checkout@v4
@@ -70,15 +70,12 @@ jobs:
           rsync -avz dkimkeys-restore/dkimkeys root@staging2.testrun.org:/etc/ || true
           ssh -o StrictHostKeyChecking=accept-new -v root@staging2.testrun.org chown root:root -R /var/lib/acme || true
 
-      - name: run formatting checks 
-        run: cmdeploy fmt -v 
-
       - name: run deploy-chatmail offline tests 
         run: pytest --pyargs cmdeploy 
 
       - run: cmdeploy init staging2.testrun.org
 
-      - run: cmdeploy run --verbose
+      - run: cmdeploy run --verbose --skip-dns-check
 
       - name: set DNS entries
         run: |

CHANGELOG.md

@@ -2,36 +2,251 @@
 
 ## untagged
 
+- Organized cmdeploy into install, configure, and activate stages
+  ([#695](https://github.com/chatmail/relay/pull/695))
+
+- docs: move readme.md docs to sphinx documentation rendered at https://chatmail.at/doc/relay 
+  ([#711](https://github.com/chatmail/relay/pull/711))
+
+- acmetool: replace cronjob with a systemd timer
+  ([#719](https://github.com/chatmail/relay/pull/719))
+
+- remove xstore@testrun.org from default passthrough recipients
+  ([#722](https://github.com/chatmail/relay/pull/722))
+
+- don't deploy the website if there are merge conflicts in the www folder
+  ([#714](https://github.com/chatmail/relay/pull/714))
+
+- acmetool: use ECDSA keys instead of RSA
+  ([#689](https://github.com/chatmail/relay/pull/689))
+
+- Require TLS 1.2 for outgoing SMTP connections
+  ([#685](https://github.com/chatmail/relay/pull/685))
+
+- require STARTTLS for incoming port 25 connections
+  ([#684](https://github.com/chatmail/relay/pull/684))
+
+- filtermail: run CPU-intensive handle_DATA in a thread pool executor
+  ([#676](https://github.com/chatmail/relay/pull/676))
+
+- don't use the complicated logging module in filtermail to exclude a potential source of errors. 
+  ([#674](https://github.com/chatmail/relay/pull/674))
+
+- Specify nginx.conf to only handle `mail_domain`, www, and mta-sts domains
+  ([#636](https://github.com/chatmail/relay/pull/636))
+
+- Setup TURN server
+  ([#621](https://github.com/chatmail/relay/pull/621))
+
+- cmdeploy: make --ssh-host work with localhost
+  ([#659](https://github.com/chatmail/relay/pull/659))
+
+- Update iroh-relay to 0.35.0
+  ([#650](https://github.com/chatmail/relay/pull/650))
+
+- filtermail: accept mails from Protonmail
+  ([#616](https://github.com/chatmail/relay/pull/616))
+
+- Ignore all RCPT TO: parameters
+  ([#651](https://github.com/chatmail/relay/pull/651))
+
+- Increase opendkim DNS Timeout from 5 to 60 seconds
+  ([#672](https://github.com/chatmail/relay/pull/672))
+
+- Add config parameter for Let's Encrypt ACME email
+  ([#663](https://github.com/chatmail/relay/pull/663))
+
+- Use max username length in newemail.py, not min
+  ([#648](https://github.com/chatmail/relay/pull/648))
+
+- Add startup for `fcgiwrap.service` because sometimes it did not start automatically.
+  ([#657](https://github.com/chatmail/relay/pull/657))
+
+- Add `cmdeploy init --force` command for recreating chatmail.ini
+  ([#656](https://github.com/chatmail/relay/pull/656))
+
+- Increase maxproc for reinjecting ports from 10 to 100
+  ([#646](https://github.com/chatmail/relay/pull/646))
+
+- Allow ports 143 and 993 to be used by `dovecot` process
+  ([#639](https://github.com/chatmail/relay/pull/639))
+
+- Add `--skip-dns-check` argument to `cmdeploy run` command, which disables DNS record checking before installation.
+  ([#661](https://github.com/chatmail/relay/pull/661))
+
+- Rework expiry of message files and mailboxes in Python 
+  to only do a single iteration over sometimes millions of messages
+  instead of doing "find" commands that iterate 9 times over the messages. 
+  Provide an "fsreport" CLI for more fine grained analysis of message files. 
+  ([#637](https://github.com/chatmail/relay/pull/637))
+
+
+## 1.7.0 2025-09-11
+
+- Make www upload path configurable
+  ([#618](https://github.com/chatmail/relay/pull/618))
+
+- Check whether GCC is installed in initenv.sh
+  ([#608](https://github.com/chatmail/relay/pull/608))
+
+- Expire push notification tokens after 90 days
+  ([#583](https://github.com/chatmail/relay/pull/583))
+
+- Use official `mtail` binary instead of `mtail` package
+  ([#581](https://github.com/chatmail/relay/pull/581))
+
+- dovecot: install from download.delta.chat instead of openSUSE Build Service
+  ([#590](https://github.com/chatmail/relay/pull/590))
+
+- Reconfigure Dovecot imap-login service to high-performance mode
+  ([#578](https://github.com/chatmail/relay/pull/578))
+
+- Set timezone to improve dovecot performance
+  ([#584](https://github.com/chatmail/relay/pull/584))
+
+- Increase nginx connection limits
+  ([#576](https://github.com/chatmail/relay/pull/576))
+
+- If `dns-utils` needs to be installed before cmdeploy run, apt update to make sure it works
+  ([#560](https://github.com/chatmail/relay/pull/560))
+
+- filtermail: respect config message size limit
+  ([#572](https://github.com/chatmail/relay/pull/572))
+
+- Don't deploy if one of the ports used for chatmail relay services is occupied by an unexpected process
+  ([#568](https://github.com/chatmail/relay/pull/568))
+
+- Add config value after how many days large files are deleted
+  ([#555](https://github.com/chatmail/relay/pull/555))
+
+- cmdeploy: push relay version to /etc/chatmail-version
+  ([#573](https://github.com/chatmail/relay/pull/573))
+
+- filtermail: allow partial body length in OpenPGP payloads
+  ([#570](https://github.com/chatmail/relay/pull/570))
+
+- chatmaild: allow echobot to receive unencrypted messages by default
+  ([#556](https://github.com/chatmail/relay/pull/556))
+
+
+## 1.6.0 2025-04-11
+
+- Handle Port-25 connect errors more gracefully (common with VPNs)
+  ([#552](https://github.com/chatmail/relay/pull/552))
+
+- Avoid "acmetool not found" during initial run
+  ([#550](https://github.com/chatmail/relay/pull/550))
+
+- Fix timezone handling such that client/servers do not need to use
+  same timezone. 
+  ([#553](https://github.com/chatmail/relay/pull/553))
+
+- Enforce end-to-end encryption for incoming messages. 
+  New user address mailboxes now get a `enforceE2EEincoming` file 
+  which prohibits incoming cleartext messages from other domains. 
+  An outside MTA trying to submit a cleartext message will 
+  get a "523 Encryption Needed" response, see RFC5248. 
+  If the file does not exist (as it the case for all existing accounts) 
+  incoming cleartext messages are accepted. 
+  ([#538](https://github.com/chatmail/server/pull/538))
+
+- Enforce end-to-end encryption between local addresses 
+  ([#535](https://github.com/chatmail/server/pull/535))
+
+- unbound: check that port 53 is not occupied by a different process
+  ([#537](https://github.com/chatmail/server/pull/537))
+
+- unbound: before unbound is there, use 9.9.9.9 for resolving
+  ([#518](https://github.com/chatmail/relay/pull/518))
+
+- Limit the bind for the HTTPS server on 8443 to 127.0.0.1 
+  ([#522](https://github.com/chatmail/server/pull/522))
+  ([#532](https://github.com/chatmail/server/pull/532))
+
+- Send SNI when connecting to outside servers
+  ([#524](https://github.com/chatmail/server/pull/524))
+
+- postfix master.cf: use 127.0.0.1 for consistency
+  ([#544](https://github.com/chatmail/relay/pull/544))
+
+- Pass through `original_content` instead of `content` in filtermail
+  ([#509](https://github.com/chatmail/server/pull/509))
+
+- Document TLS requirements in the readme
+  ([#514](https://github.com/chatmail/server/pull/514))
+
+- Remove cleanup service from submission ports
+  ([#512](https://github.com/chatmail/server/pull/512))
+
+- cmdeploy dovecot: delete big messages after 7 days
+  ([#504](https://github.com/chatmail/server/pull/504))
+
+- mtail: fix getting logs from STDIN
+  ([#502](https://github.com/chatmail/server/pull/502))
+
+- filtermail: don't require exactly 2 lines after openPGP payload
+  ([#497](https://github.com/chatmail/server/pull/497))
+
+- cmdeploy dns: offer alternative DKIM record format for some web interfaces
+  ([#470](https://github.com/chatmail/server/pull/470))
+
+- journald: remove old logs from disk
+  ([#490](https://github.com/chatmail/server/pull/490))
+
+- opendkim: restart once every day to mend RAM leaks
+  ([#498](https://github.com/chatmail/server/pull/498)
+
+- migration guide: let opendkim own the DKIM keys directory
+  ([#468](https://github.com/chatmail/server/pull/468))
+
+- improve secure-join message detection
+  ([#473](https://github.com/chatmail/server/pull/473))
+
+- use old crypt lib in python < 3.11
+  ([#483](https://github.com/chatmail/server/pull/483))
+
+- chatmaild: set umask to 0700 for doveauth + metadata
+  ([#490](https://github.com/chatmail/server/pull/492))
+
+- remove MTA-STS daemon
+  ([#488](https://github.com/chatmail/server/pull/488))
+
+- replace `Subject` with `[...]` for all outgoing mails.
+  ([#481](https://github.com/chatmail/server/pull/481))
+
+- opendkim: use su instead of sudo
+  ([#491](https://github.com/chatmail/server/pull/491))
+
 ## 1.5.0 2024-12-20
 
 - cmdeploy dns: always show recommended DNS records
-  ([#463](https://github.com/deltachat/chatmail/pull/463))
+  ([#463](https://github.com/chatmail/server/pull/463))
 
 - add `--all` to `cmdeploy dns`
-  ([#462](https://github.com/deltachat/chatmail/pull/462))
+  ([#462](https://github.com/chatmail/server/pull/462))
 
 - fix `_mta-sts` TXT DNS record
-  ([#461](https://github.com/deltachat/chatmail/pull/461)
+  ([#461](https://github.com/chatmail/server/pull/461)
 
 - deploy `iroh-relay` and also update "realtime relay services" in privacy policy. 
-  ([#434](https://github.com/deltachat/chatmail/pull/434))
+  ([#434](https://github.com/chatmail/server/pull/434))
-  ([#451](https://github.com/deltachat/chatmail/pull/451))
+  ([#451](https://github.com/chatmail/server/pull/451))
 
 - add guide to migrate chatmail to a new server
-  ([#429](https://github.com/deltachat/chatmail/pull/429))
+  ([#429](https://github.com/chatmail/server/pull/429))
 
 - disable anvil authentication penalty
-  ([#414](https://github.com/deltachat/chatmail/pull/444)
+  ([#414](https://github.com/chatmail/server/pull/444)
 
 - increase `request_queue_size` for UNIX sockets to 1000.
-  ([#437](https://github.com/deltachat/chatmail/pull/437))
+  ([#437](https://github.com/chatmail/server/pull/437))
 
 - add argument to `cmdeploy run` for specifying
   a different SSH host than `mail_domain`
-  ([#439](https://github.com/deltachat/chatmail/pull/439))
+  ([#439](https://github.com/chatmail/server/pull/439))
 
 - query autoritative nameserver to bypass DNS cache
-  ([#424](https://github.com/deltachat/chatmail/pull/424))
+  ([#424](https://github.com/chatmail/server/pull/424))
 
 - add mtail support (new optional `mtail_address` ini value)
   This defines the address on which [`mtail`](https://google.github.io/mtail/)
@@ -41,195 +256,195 @@
   and assign an IP address from this network to the host.
   If you do not plan to collect metrics,
   keep this setting unset.
-  ([#388](https://github.com/deltachat/chatmail/pull/388))
+  ([#388](https://github.com/chatmail/server/pull/388))
 
 - fix checking for required DNS records
-  ([#412](https://github.com/deltachat/chatmail/pull/412))
+  ([#412](https://github.com/chatmail/server/pull/412))
 
 - add support for specifying whole domains for recipient passthrough list
-  ([#408](https://github.com/deltachat/chatmail/pull/408))
+  ([#408](https://github.com/chatmail/server/pull/408))
 
 - add a paragraph about "account deletion" to info page 
-  ([#405](https://github.com/deltachat/chatmail/pull/405))
+  ([#405](https://github.com/chatmail/server/pull/405))
 
 - avoid nginx listening on ipv6 if v6 is dsiabled 
-  ([#402](https://github.com/deltachat/chatmail/pull/402))
+  ([#402](https://github.com/chatmail/server/pull/402))
 
 - refactor ssh-based execution to allow organizing remote functions in
   modules. 
-  ([#396](https://github.com/deltachat/chatmail/pull/396))
+  ([#396](https://github.com/chatmail/server/pull/396))
 
 - trigger "apt upgrade" during "cmdeploy run" 
-  ([#398](https://github.com/deltachat/chatmail/pull/398))
+  ([#398](https://github.com/chatmail/server/pull/398))
 
 - drop hispanilandia passthrough address
-  ([#401](https://github.com/deltachat/chatmail/pull/401))
+  ([#401](https://github.com/chatmail/server/pull/401))
 
 - set CAA record flags to 0
 
 - add IMAP capabilities instead of overwriting them
-  ([#413](https://github.com/deltachat/chatmail/pull/413))
+  ([#413](https://github.com/chatmail/server/pull/413))
 
 - fix OpenPGP payload check
-  ([#435](https://github.com/deltachat/chatmail/pull/435))
+  ([#435](https://github.com/chatmail/server/pull/435))
 
 - fix Dovecot quota_max_mail_size to use max_message_size config value
-  ([#438](https://github.com/deltachat/chatmail/pull/438))
+  ([#438](https://github.com/chatmail/server/pull/438))
 
 
 ## 1.4.1 2024-07-31
 
 - fix metadata dictproxy which would confuse transactions
   resulting in missed notifications and other issues. 
-  ([#393](https://github.com/deltachat/chatmail/pull/393))
+  ([#393](https://github.com/chatmail/server/pull/393))
-  ([#394](https://github.com/deltachat/chatmail/pull/394))
+  ([#394](https://github.com/chatmail/server/pull/394))
 
 - add optional "imap_rawlog" config option. If true, 
   .in/.out files are created in user home dirs 
   containing the imap protocol messages. 
-  ([#389](https://github.com/deltachat/chatmail/pull/389))
+  ([#389](https://github.com/chatmail/server/pull/389))
 
 ## 1.4.0 2024-07-28
 
 - Add `disable_ipv6` config option to chatmail.ini.
   Required if the server doesn't have IPv6 connectivity.
-  ([#312](https://github.com/deltachat/chatmail/pull/312))
+  ([#312](https://github.com/chatmail/server/pull/312))
 
 - allow current K9/Thunderbird-mail releases to send encrypted messages
   outside by accepting their localized "encrypted subject" strings. 
-  ([#370](https://github.com/deltachat/chatmail/pull/370))
+  ([#370](https://github.com/chatmail/server/pull/370))
 
 - Migrate and remove sqlite database in favor of password/lastlogin tracking 
   in a user's maildir.  
-  ([#379](https://github.com/deltachat/chatmail/pull/379))
+  ([#379](https://github.com/chatmail/server/pull/379))
 
 - Require pyinfra V3 installed on the client side,
   run `./scripts/initenv.sh` to upgrade locally.
-  ([#378](https://github.com/deltachat/chatmail/pull/378))
+  ([#378](https://github.com/chatmail/server/pull/378))
 
 - don't hardcode "/home/vmail" paths but rather set them 
   once in the config object and use it everywhere else, 
   thereby also improving testability.  
-  ([#351](https://github.com/deltachat/chatmail/pull/351))
+  ([#351](https://github.com/chatmail/server/pull/351))
   temporarily introduced obligatory "passdb_path" and "mailboxes_dir" 
   settings but they were removed/obsoleted in 
-  ([#380](https://github.com/deltachat/chatmail/pull/380))
+  ([#380](https://github.com/chatmail/server/pull/380))
 
 - BREAKING: new required chatmail.ini value 'delete_inactive_users_after = 100'
   which removes users from database and mails after 100 days without any login. 
-  ([#350](https://github.com/deltachat/chatmail/pull/350))
+  ([#350](https://github.com/chatmail/server/pull/350))
 
 - Refine DNS checking to distinguish between "required" and "recommended" settings 
-  ([#372](https://github.com/deltachat/chatmail/pull/372))
+  ([#372](https://github.com/chatmail/server/pull/372))
 
 - reload nginx in the acmetool cronjob
-  ([#360](https://github.com/deltachat/chatmail/pull/360))
+  ([#360](https://github.com/chatmail/server/pull/360))
 
 - remove checking of reverse-DNS PTR records.  Chatmail-servers don't
   depend on it and even in the wider e-mail system it's not common anymore. 
   If it's an issue, a chatmail operator can still care to properly set reverse DNS. 
-  ([#348](https://github.com/deltachat/chatmail/pull/348))
+  ([#348](https://github.com/chatmail/server/pull/348))
 
 - Make DNS-checking faster and more interactive, run it fully during "cmdeploy run",
   also introducing a generic mechanism for rapid remote ssh-based python function execution. 
-  ([#346](https://github.com/deltachat/chatmail/pull/346))
+  ([#346](https://github.com/chatmail/server/pull/346))
 
 - Don't fix file owner ship of /home/vmail 
-  ([#345](https://github.com/deltachat/chatmail/pull/345))
+  ([#345](https://github.com/chatmail/server/pull/345))
 
 - Support iterating over all users with doveadm commands 
-  ([#344](https://github.com/deltachat/chatmail/pull/344))
+  ([#344](https://github.com/chatmail/server/pull/344))
 
 - Test and fix for attempts to create inadmissible accounts 
-  ([#333](https://github.com/deltachat/chatmail/pull/321))
+  ([#333](https://github.com/chatmail/server/pull/321))
 
 - check that OpenPGP has only PKESK, SKESK and SEIPD packets
-  ([#323](https://github.com/deltachat/chatmail/pull/323),
+  ([#323](https://github.com/chatmail/server/pull/323),
-   [#324](https://github.com/deltachat/chatmail/pull/324))
+   [#324](https://github.com/chatmail/server/pull/324))
 
 - improve filtermail checks for encrypted messages and drop support for unencrypted MDNs
-  ([#320](https://github.com/deltachat/chatmail/pull/320))
+  ([#320](https://github.com/chatmail/server/pull/320))
 
 - replace `bash` with `/bin/sh`
-  ([#334](https://github.com/deltachat/chatmail/pull/334))
+  ([#334](https://github.com/chatmail/server/pull/334))
 
 - Increase number of logged in IMAP sessions to 50000
-  ([#335](https://github.com/deltachat/chatmail/pull/335))
+  ([#335](https://github.com/chatmail/server/pull/335))
 
 - filtermail: do not allow ASCII armor without actual payload
-  ([#325](https://github.com/deltachat/chatmail/pull/325))
+  ([#325](https://github.com/chatmail/server/pull/325))
 
 - Remove sieve to enable hardlink deduplication in LMTP
-  ([#343](https://github.com/deltachat/chatmail/pull/343))
+  ([#343](https://github.com/chatmail/server/pull/343))
 
 - dovecot: enable gzip compression on disk
-  ([#341](https://github.com/deltachat/chatmail/pull/341))
+  ([#341](https://github.com/chatmail/server/pull/341))
 
 - DKIM-sign Content-Type and oversign all signed headers
-  ([#296](https://github.com/deltachat/chatmail/pull/296))
+  ([#296](https://github.com/chatmail/server/pull/296))
 
 - Add nonci_accounts metric
-  ([#347](https://github.com/deltachat/chatmail/pull/347))
+  ([#347](https://github.com/chatmail/server/pull/347))
 
 - doveauth: log when a new account is created
-  ([#349](https://github.com/deltachat/chatmail/pull/349))
+  ([#349](https://github.com/chatmail/server/pull/349))
 
 - Multiplex HTTPS, IMAP and SMTP on port 443
-  ([#357](https://github.com/deltachat/chatmail/pull/357))
+  ([#357](https://github.com/chatmail/server/pull/357))
 
 ## 1.3.0 - 2024-06-06
 
 - don't check necessary DNS records on cmdeploy init anymore
-  ([#316](https://github.com/deltachat/chatmail/pull/316))
+  ([#316](https://github.com/chatmail/server/pull/316))
 
 - ensure cron and acl are installed
-  ([#293](https://github.com/deltachat/chatmail/pull/293),
+  ([#293](https://github.com/chatmail/server/pull/293),
-  [#310](https://github.com/deltachat/chatmail/pull/310))
+  [#310](https://github.com/chatmail/server/pull/310))
 
 - change default for delete_mails_after from 40 to 20 days
-  ([#300](https://github.com/deltachat/chatmail/pull/300))
+  ([#300](https://github.com/chatmail/server/pull/300))
 
 - save journald logs only to memory and save nginx logs to journald instead of file
-  ([#299](https://github.com/deltachat/chatmail/pull/299))
+  ([#299](https://github.com/chatmail/server/pull/299))
 
 - fix writing of multiple obs repositories in `/etc/apt/sources.list`
-  ([#290](https://github.com/deltachat/chatmail/pull/290))
+  ([#290](https://github.com/chatmail/server/pull/290))
 
 - metadata: add support for `/shared/vendor/deltachat/irohrelay`
-  ([#284](https://github.com/deltachat/chatmail/pull/284))
+  ([#284](https://github.com/chatmail/server/pull/284))
 
 - Emit "XCHATMAIL" capability from IMAP server 
-  ([#278](https://github.com/deltachat/chatmail/pull/278))
+  ([#278](https://github.com/chatmail/server/pull/278))
 
 - Move echobot `into /var/lib/echobot`
-  ([#281](https://github.com/deltachat/chatmail/pull/281))
+  ([#281](https://github.com/chatmail/server/pull/281))
 
 - Accept Let's Encrypt's new Terms of Services
-  ([#275](https://github.com/deltachat/chatmail/pull/276))
+  ([#275](https://github.com/chatmail/server/pull/276))
 
 - Reload Dovecot and Postfix when TLS certificate updates
-  ([#271](https://github.com/deltachat/chatmail/pull/271))
+  ([#271](https://github.com/chatmail/server/pull/271))
 
 - Use forked version of dovecot without hardcoded delays
-  ([#270](https://github.com/deltachat/chatmail/pull/270))
+  ([#270](https://github.com/chatmail/server/pull/270))
 
 ## 1.2.0 - 2024-04-04
 
 - Install dig on the server to resolve DNS records
-  ([#267](https://github.com/deltachat/chatmail/pull/267))
+  ([#267](https://github.com/chatmail/server/pull/267))
 
 - preserve notification order and exponentially backoff with 
   retries for tokens where we didn't get a successful return
-  ([#265](https://github.com/deltachat/chatmail/pull/263))
+  ([#265](https://github.com/chatmail/server/pull/263))
 
 - Run chatmail-metadata and doveauth as vmail
-  ([#261](https://github.com/deltachat/chatmail/pull/261))
+  ([#261](https://github.com/chatmail/server/pull/261))
 
 - Apply systemd restrictions to echobot
-  ([#259](https://github.com/deltachat/chatmail/pull/259))
+  ([#259](https://github.com/chatmail/server/pull/259))
 
 - re-enable running the CI in pull requests, but not concurrently 
-  ([#258](https://github.com/deltachat/chatmail/pull/258))
+  ([#258](https://github.com/chatmail/server/pull/258))
 
 
 ## 1.1.0 - 2024-03-28
@@ -237,27 +452,27 @@
 ### The changelog starts to record changes from March 15th, 2024 
 
 - Move systemd unit templates to cmdeploy package 
-  ([#255](https://github.com/deltachat/chatmail/pull/255))
+  ([#255](https://github.com/chatmail/server/pull/255))
 
 - Persist push tokens and support multiple device per address 
-  ([#254](https://github.com/deltachat/chatmail/pull/254))
+  ([#254](https://github.com/chatmail/server/pull/254))
 
 - Avoid warning for regular doveauth protocol's hello message. 
-  ([#250](https://github.com/deltachat/chatmail/pull/250))
+  ([#250](https://github.com/chatmail/server/pull/250))
 
 - Fix various tests to pass again with "cmdeploy test". 
-  ([#245](https://github.com/deltachat/chatmail/pull/245),
+  ([#245](https://github.com/chatmail/server/pull/245),
-  [#242](https://github.com/deltachat/chatmail/pull/242)
+  [#242](https://github.com/chatmail/server/pull/242)
 
 - Ensure lets-encrypt certificates are reloaded after renewal 
-  ([#244]) https://github.com/deltachat/chatmail/pull/244
+  ([#244]) https://github.com/chatmail/server/pull/244
 
 - Persist tokens to avoid iOS users loosing push-notifications when the
   chatmail metadata service is restarted (happens regularly during deploys)
-  ([#238](https://github.com/deltachat/chatmail/pull/239)
+  ([#238](https://github.com/chatmail/server/pull/239)
 
 - Fix failing sieve-script compile errors on incoming messages
-  ([#237](https://github.com/deltachat/chatmail/pull/239)
+  ([#237](https://github.com/chatmail/server/pull/239)
 
 - Fix quota reporting after expunging of old mails
-  ([#233](https://github.com/deltachat/chatmail/pull/239)
+  ([#233](https://github.com/chatmail/server/pull/239)

README.md

@@ -1,440 +1,20 @@
 
-<img width="800px" src="www/src/collage-top.png"/>
+# Chatmail relays for end-to-end encrypted email
 
-# Chatmail services optimized for Delta Chat apps 
+Chatmail relay servers are interoperable Mail Transport Agents (MTAs) designed for: 
 
-This repository helps to setup a ready-to-use chatmail server
+-  **Zero State:** no private data or metadata collected, messages are auto-deleted, low disk usage
-comprised of a minimal setup of the battle-tested 
-[postfix smtp](https://www.postfix.org) and [dovecot imap](https://www.dovecot.org) services. 
 
-The setup is designed and optimized for providing chatmail accounts 
+-  **Instant/Realtime:** sub-second message delivery, realtime P2P
-for use by [Delta Chat apps](https://delta.chat).
+   streaming, privacy-preserving Push Notifications for Apple, Google, and Huawei;
 
-Chatmail accounts are automatically created by a first login, 
+-  **Security Enforcement**: only strict TLS, DKIM and OpenPGP with minimized metadata accepted
-after which the initially specified password is required for using them. 
 
-## Deploying your own chatmail server 
+-  **Reliable Federation and Decentralization:** No spam or IP reputation checks, federating
+   depends on established IETF standards and protocols.
 
-To deploy chatmail on your own server, you must have set-up ssh authentication and need to use an ed25519 key, due to an [upstream bug in paramiko](https://github.com/paramiko/paramiko/issues/2191). You also need to add your private key to the local ssh-agent, because you can't type in your password during deployment.
+This repository contains everything needed to setup a ready-to-use chatmail relay on an ssh-reachable host. 
+For getting started and more information please refer to the web version of this repositories' documentation at
 
-We use `chat.example.org` as the chatmail domain in the following steps. 
+[https://chatmail.at/doc/relay](https://chatmail.at/doc/relay)
-Please substitute it with your own domain. 
 
-1. Install the `cmdeploy` command in a virtualenv
-
-   ```
-    git clone https://github.com/deltachat/chatmail
-    cd chatmail
-    scripts/initenv.sh
-   ```
-
-2. Create chatmail configuration file `chatmail.ini`:
-
-   ```
-    scripts/cmdeploy init chat.example.org  # <-- use your domain 
-   ```
-
-3. Point your domain to the server's IP address,
-   if you haven't done so already.
-   Verify that SSH root login works:
-
-   ```
-    ssh root@chat.example.org   # <-- use your domain 
-   ```
-
-4. Deploy to the remote chatmail server:
-
-   ```
-    scripts/cmdeploy run
-   ```
-   This script will check that you have all necessary DNS records.
-   If DNS records are missing, it will recommend
-   which you should configure at your DNS provider
-   (it can take some time until they are public).
-
-### Other helpful commands:
-
-To check the status of your remotely running chatmail service:
-
-```
-scripts/cmdeploy status
-```
-
-To display and check all recommended DNS records:
-
-```
-scripts/cmdeploy dns
-```
-
-To test whether your chatmail service is working correctly:
-
-```
-scripts/cmdeploy test
-```
-
-To measure the performance of your chatmail service:
-
-```
-scripts/cmdeploy bench
-```
-
-## Overview of this repository
-
-This repository has four directories:
-
-- [cmdeploy](https://github.com/deltachat/chatmail/tree/main/cmdeploy)
-  is a collection of configuration files
-  and a [pyinfra](https://pyinfra.com)-based deployment script.
-
-- [chatmaild](https://github.com/deltachat/chatmail/tree/main/chatmaild)
-  is a python package containing several small services
-  which handle authentication,
-  trigger push notifications on new messages,
-  ensure that outbound mails are encrypted,
-  delete inactive users,
-  and some other minor things.
-  chatmaild can also be installed as a stand-alone python package.
-
-- [www](https://github.com/deltachat/chatmail/tree/main/www)
-  contains the html, css, and markdown files
-  which make up a chatmail server's web page.
-  Edit them before deploying to make your chatmail server stand out.
-
-- [scripts](https://github.com/deltachat/chatmail/tree/main/scripts)
-  offers two convenience tools for beginners;
-  `initenv.sh` installs the necessary dependencies to a local virtual environment,
-  and the `scripts/cmdeploy` script enables you
-  to run the `cmdeploy` command line tool in the local virtual environment.
-
-### cmdeploy
-
-The `cmdeploy/src/cmdeploy/cmdeploy.py` command line tool
-helps with setting up and managing the chatmail service.
-`cmdeploy init` creates the `chatmail.ini` config file.
-`cmdeploy run` uses a [pyinfra](https://pyinfra.com/)-based [script](`cmdeploy/src/cmdeploy/__init__.py`)
-to automatically install or upgrade all chatmail components on a server,
-according to the `chatmail.ini` config.
-
-The components of chatmail are:
-
-- [postfix smtp server](https://www.postfix.org) accepts sent messages (both from your users and from other servers)
-
-- [dovecot imap server](https://www.dovecot.org) stores messages for your users until they download them
-
-- [nginx](https://nginx.org/) shows the web page with your privacy policy and additional information
-
-- [acmetool](https://hlandau.github.io/acmetool/) manages TLS certificates for dovecot, postfix, and nginx
-
-- [opendkim](http://www.opendkim.org/) for signing messages with DKIM and rejecting inbound messages without DKIM
-
-- [mtail](https://google.github.io/mtail/) for collecting anonymized metrics in case you have monitoring
-
-- and the chatmaild services, explained in the next section:
-
-### chatmaild
-
-chatmaild offers several commands
-which differentiate a *chatmail* server from a classic mail server.
-If you deploy them with cmdeploy,
-they are run by systemd services in the background.
-A short overview:
-
-- [`doveauth`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/doveauth.py) implements
-  create-on-login account creation semantics and is used
-  by Dovecot during login authentication and by Postfix
-  which in turn uses [Dovecot SASL](https://doc.dovecot.org/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket)
-  to authenticate users
-  to send mails for them.
-
-- [`filtermail`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/filtermail.py) prevents
-  unencrypted e-mail from leaving the chatmail service
-  and is integrated into postfix's outbound mail pipelines.
-
-- [`chatmail-metadata`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/metadata.py) is contacted by a
-  [dovecot lua script](https://github.com/deltachat/chatmail/blob/main/cmdeploy/src/cmdeploy/dovecot/push_notification.lua)
-  to store user-specific server-side config.
-  On new messages,
-  it [passes the user's push notification token](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/notifier.py)
-  to [notifications.delta.chat](https://delta.chat/help#instant-delivery)
-  so the push notifications on the user's phone can be triggered
-  by Apple/Google.
-
-- [`delete_inactive_users`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/delete_inactive_users.py)
-  deletes users if they have not logged in for a very long time.
-  The timeframe can be configured in `chatmail.ini`.
-
-- [`lastlogin`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/lastlogin.py)
-  is contacted by dovecot when a user logs in
-  and stores the date of the login.
-
-- [`echobot`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/echo.py)
-  is a small bot for test purposes.
-  It simply echoes back messages from users.
-
-- [`chatmail-metrics`](https://github.com/deltachat/chatmail/blob/main/chatmaild/src/chatmaild/metrics.py)
-  collects some metrics and displays them at `https://example.org/metrics`.
-
-### Home page and getting started for users
-
-`cmdeploy run` also creates default static Web pages and deploys them
-to a nginx web server with: 
-
-- a default `index.html` along with a QR code that users can click to
-  create accounts on your chatmail provider,
-
-- a default `info.html` that is linked from the home page,
-
-- a default `policy.html` that is linked from the home page.
-
-All `.html` files are generated
-by the according markdown `.md` file in the `www/src` directory.
-
-
-### Refining the web pages
-
-
-```
-scripts/cmdeploy webdev
-```
-
-This starts a local live development cycle for chatmail Web pages:
-
-- uses the `www/src/page-layout.html` file for producing static
-  HTML pages from `www/src/*.md` files
-
-- continously builds the web presence reading files from `www/src` directory
-  and generating html files and copying assets to the `www/build` directory.
-
-- Starts a browser window automatically where you can "refresh" as needed.
-
-
-## Emergency Commands to disable automatic account creation
-
-If you need to stop account creation,
-e.g. because some script is wildly creating accounts,
-login to the server with ssh and run:
-
-```
-    touch /etc/chatmail-nocreate
-```
-
-While this file is present, account creation will be blocked.
-
-### Ports
-
-[Postfix](http://www.postfix.org/) listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
-[Dovecot](https://www.dovecot.org/) listens on ports 143 (imap) and 993 (imaps).
-[nginx](https://www.nginx.com/) listens on port 8443 (https-alt) and 443 (https).
-Port 443 multiplexes HTTPS, IMAP and SMTP using ALPN to redirect connections to ports 8443, 465 or 993.
-[acmetool](https://hlandau.github.io/acmetool/) listens on port 80 (http).
-
-Delta Chat apps will, however, discover all ports and configurations
-automatically by reading the [autoconfig XML file](https://www.ietf.org/archive/id/draft-bucksch-autoconfig-00.html) from the chatmail service.
-
-## Email authentication
-
-chatmail servers rely on [DKIM](https://www.rfc-editor.org/rfc/rfc6376)
-to authenticate incoming emails.
-Incoming emails must have a valid DKIM signature with
-Signing Domain Identifier (SDID, `d=` parameter in the DKIM-Signature header)
-equal to the `From:` header domain.
-This property is checked by OpenDKIM screen policy script
-before validating the signatures.
-This correpsonds to strict [DMARC](https://www.rfc-editor.org/rfc/rfc7489) alignment (`adkim=s`),
-but chatmail does not rely on DMARC and does not consult the sender policy published in DMARC records.
-Other legacy authentication mechanisms such as [iprev](https://www.rfc-editor.org/rfc/rfc8601#section-2.7.3)
-and [SPF](https://www.rfc-editor.org/rfc/rfc7208) are also not taken into account.
-If there is no valid DKIM signature on the incoming email,
-the sender receives a "5.7.1 No valid DKIM signature found" error.
-
-Outgoing emails must be sent over authenticated connection
-with envelope MAIL FROM (return path) corresponding to the login.
-This is ensured by Postfix which maps login username
-to MAIL FROM with
-[`smtpd_sender_login_maps`](https://www.postfix.org/postconf.5.html#smtpd_sender_login_maps)
-and rejects incorrectly authenticated emails with [`reject_sender_login_mismatch`](reject_sender_login_mismatch) policy.
-`From:` header must correspond to envelope MAIL FROM,
-this is ensured by `filtermail` proxy.
-
-## Migrating chatmail server to a new host
-
-If you want to migrate chatmail from an old machine
-to a new machine,
-you can use these steps.
-They were tested with a linux laptop;
-you might need to adjust some of the steps to your environment.
-
-Let's assume that your `mail_domain` is `mail.example.org`,
-all involved machines run Debian 12,
-your old server's IP address is `13.37.13.37`,
-and your new server's IP address is `13.12.23.42`.
-
-During the guide, you might get a warning about changed SSH Host keys;
-in this case, just run `ssh-keygen -R "mail.example.org"` as recommended
-to make sure you can connect with SSH.
-
-1. First, copy `/var/lib/acme` to the new server with
-   `ssh root@13.37.13.37 tar c /var/lib/acme | ssh root@13.12.23.42 tar x -C /var/lib/`.
-   This transfers your TLS certificate.
-
-2. You should also copy `/etc/dkimkeys` to the new server with
-   `ssh root@13.37.13.37 tar c /etc/dkimkeys | ssh root@13.12.23.42 tar x -C /etc/`
-   so the DKIM DNS record stays correct.
-
-3. On the new server, run `chown root: -R /var/lib/acme` and `chown root: -R /etc/dkimkeys` to make sure the permissions are correct.
-
-4. Run `cmdeploy run --disable-mail --ssh-host 13.12.23.42` to install chatmail on the new machine.
-   postfix and dovecot are disabled for now,
-   we will enable them later.
-
-5. Now, point DNS to the new IP addresses.
-
-   You can already remove the old IP addresses from DNS.
-   Existing Delta Chat users will still be able to connect
-   to the old server, send and receive messages,
-   but new users will fail to create new profiles
-   with your chatmail server.
-
-   If other servers try to deliver messages to your new server they will fail,
-   but normally email servers will retry delivering messages
-   for at least a week, so messages will not be lost.
-
-6. Now you can run `cmdeploy run --disable-mail --ssh-host 13.37.13.37` to disable your old server.
-
-   Now your users will notice the migration
-   and will not be able to send or receive messages
-   until the migration is completed.
-
-7. After everything is stopped,
-    you can copy the `/home/vmail/mail` directory to the new server.
-    It includes all user data, messages, password hashes, etc.
-
-    Just run: `ssh root@13.37.13.37 tar c /home/vmail/mail | ssh root@13.12.23.42 tar x -C /home/vmail/`
-
-    After this, your new server has all the necessary files to start operating :)
-
-8. To be sure the permissions are still fine,
-    run `chown vmail: -R /home/vmail` on the new server.
-
-9. Finally, you can run `cmdeploy run` to turn on chatmail on the new server.
-    Your users can continue using the chatmail server,
-    and messages which were sent after step 6. should arrive now.
-    Voilà!
-
-## Setting up a reverse proxy
-
-A chatmail server does not depend on the client IP address
-for its operation, so it can be run behind a reverse proxy.
-This will not even affect incoming mail authentication
-as DKIM only checks the cryptographic signature
-of the message and does not use the IP address as the input.
-
-For example, you may want to self-host your chatmail server
-and only use hosted VPS to provide a public IP address
-for client connections and incoming mail.
-You can connect chatmail server to VPS
-using a tunnel protocol
-such as [WireGuard](https://www.wireguard.com/)
-and setup a reverse proxy on a VPS
-to forward connections to the chatmail server
-over the tunnel.
-You can also setup multiple reverse proxies
-for your chatmail server in different networks
-to ensure your server is reachable even when
-one of the IPs becomes inaccessible due to
-hosting or routing problems.
-
-Note that your server still needs
-to be able to make outgoing connections on port 25
-to send messages outside.
-
-To setup a reverse proxy
-(or rather Destination NAT, DNAT)
-for your chatmail server,
-put the following configuration in `/etc/nftables.conf`:
-```
-#!/usr/sbin/nft -f
-
-flush ruleset
-
-define wan = eth0
-
-# Which ports to proxy.
-#
-# Note that SSH is not proxied
-# so it is possible to log into the proxy server
-# and not the original one.
-define ports = { smtp, http, https, imap, imaps, submission, submissions }
-
-# The host we want to proxy to.
-define ipv4_address = AAA.BBB.CCC.DDD
-define ipv6_address = [XXX::1]
-
-table ip nat {
-        chain prerouting {
-                type nat hook prerouting priority dstnat; policy accept;
-                iif $wan tcp dport $ports dnat to $ipv4_address
-        }
-
-        chain postrouting {
-                type nat hook postrouting priority 0;
-
-                oifname $wan masquerade
-        }
-}
-
-table ip6 nat {
-        chain prerouting {
-                type nat hook prerouting priority dstnat; policy accept;
-                iif $wan tcp dport $ports dnat to $ipv6_address
-        }
-
-        chain postrouting {
-                type nat hook postrouting priority 0;
-
-                oifname $wan masquerade
-        }
-}
-
-table inet filter {
-        chain input {
-                type filter hook input priority filter; policy drop;
-
-                # Accept ICMP.
-                # It is especially important to accept ICMPv6 ND messages,
-                # otherwise IPv6 connectivity breaks.
-                icmp type { echo-request } accept
-                icmpv6 type { echo-request, nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert } accept
-
-                # Allow incoming SSH connections.
-                tcp dport { ssh } accept
-
-                ct state established accept
-        }
-        chain forward {
-                type filter hook forward priority filter; policy drop;
-
-                ct state established accept
-                ip daddr $ipv4_address counter accept
-                ip6 daddr $ipv6_address counter accept
-        }
-        chain output {
-                type filter hook output priority filter;
-        }
-}
-```
-
-Run `systemctl enable nftables.service`
-to ensure configuration is reloaded when the proxy server reboots.
-
-Uncomment in `/etc/sysctl.conf` the following two lines:
-
-```
-net.ipv4.ip_forward=1
-net.ipv6.conf.all.forwarding=1
-```
-
-Then reboot the server or do `sysctl -p` and `nft -f /etc/nftables.conf`.
-
-Once proxy server is set up,
-you can add its IP address to the DNS.

chatmaild/pyproject.toml

@@ -12,6 +12,7 @@ dependencies = [
   "deltachat-rpc-client",
   "filelock",
   "requests",
+  "crypt-r >= 3.13.1 ; python_version >= '3.11'",
 ]
 
 [tool.setuptools]
@@ -26,8 +27,10 @@ chatmail-metadata = "chatmaild.metadata:main"
 filtermail = "chatmaild.filtermail:main"
 echobot = "chatmaild.echo:main"
 chatmail-metrics = "chatmaild.metrics:main"
-delete_inactive_users = "chatmaild.delete_inactive_users:main"
+chatmail-expire = "chatmaild.expire:main"
+chatmail-fsreport = "chatmaild.fsreport:main"
 lastlogin = "chatmaild.lastlogin:main"
+turnserver = "chatmaild.turnserver:main"
 
 [project.entry-points.pytest11]
 "chatmaild.testplugin" = "chatmaild.tests.plugin"
@@ -47,6 +50,9 @@ lint.select = [
   "PLE", # Pylint Error
   "PLW", # Pylint Warning
 ]
+lint.ignore = [
+  "PLC0415" # import-outside-top-level
+]
 
 [tool.tox]
 legacy_tox_ini = """
@@ -66,5 +72,6 @@ commands =
 [testenv]
 deps = pytest 
        pdbpp 
+       pytest-localserver
 commands = pytest -v -rsXx {posargs}
 """

chatmaild/src/chatmaild/common_encrypted_subjects.py

@@ -1,59 +0,0 @@
-"""Generated from deltachat, draft-ietf-lamps-header-protection, and
-encrypted_subject localizations in
-https://github.com/thunderbird/thunderbird-android/
-
-"""
-
-common_encrypted_subjects = {
-    "...",
-    "[...]",
-    "암호화된 메시지",
-    "Ĉifrita mesaĝo",
-    "Courriel chiffré",
-    "Dulrituð skilaboð",
-    "Encrypted Message",
-    "Fersifere berjocht",
-    "Kemennadenn enrineget",
-    "Krüptitud kiri",
-    "Krypterat meddelande",
-    "Krypteret besked",
-    "Kryptert melding",
-    "Mensagem criptografada",
-    "Mensagem encriptada",
-    "Mensaje cifrado",
-    "Mensaxe cifrada",
-    "Mesaj Criptat",
-    "Mesazh i Fshehtëzuar",
-    "Messaggio criptato",
-    "Messaghju cifratu",
-    "Missatge encriptat",
-    "Neges wedi'i Hamgryptio",
-    "Pesan terenkripsi",
-    "Salattu viesti",
-    "Şifreli İleti",
-    "Šifrēta ziņa",
-    "Šifrirana poruka",
-    "Šifrirano sporočilo",
-    "Šifruotas laiškas",
-    "Tin nhắn được mã hóa",
-    "Titkosított üzenet",
-    "Verschlüsselte Nachricht",
-    "Versleuteld bericht",
-    "Zašifrovaná zpráva",
-    "Zaszyfrowana wiadomość",
-    "Zifratu mezua",
-    "Κρυπτογραφημένο μήνυμα",
-    "Зашифроване повідомлення",
-    "Зашифрованное сообщение",
-    "Зашыфраваны ліст",
-    "Криптирано съобщение",
-    "Шифрована порука",
-    "დაშიფრული წერილი",
-    "הודעה מוצפנת",
-    "پیام رمزنگاری‌شده",
-    "رسالة مشفّرة",
-    "എൻക്രിപ്റ്റുചെയ്‌ത സന്ദേശം",
-    "加密邮件",
-    "已加密的訊息",
-    "暗号化されたメッセージ",
-}

chatmaild/src/chatmaild/config.py

@@ -11,7 +11,11 @@ def read_config(inipath):
     assert Path(inipath).exists(), inipath
     cfg = iniconfig.IniConfig(inipath)
     params = cfg.sections["params"]
-    return Config(inipath, params=params)
+    default_config_content = get_default_config_content(params["mail_domain"])
+    df_params = iniconfig.IniConfig("ini", data=default_config_content)["params"]
+    new_params = dict(df_params.items())
+    new_params.update(params)
+    return Config(inipath, params=new_params)
 
 
 class Config:
@@ -22,16 +26,25 @@ class Config:
         self.max_mailbox_size = params["max_mailbox_size"]
         self.max_message_size = int(params.get("max_message_size", "31457280"))
         self.delete_mails_after = params["delete_mails_after"]
+        self.delete_large_after = params["delete_large_after"]
         self.delete_inactive_users_after = int(params["delete_inactive_users_after"])
         self.username_min_length = int(params["username_min_length"])
         self.username_max_length = int(params["username_max_length"])
         self.password_min_length = int(params["password_min_length"])
         self.passthrough_senders = params["passthrough_senders"].split()
         self.passthrough_recipients = params["passthrough_recipients"].split()
+        self.www_folder = params.get("www_folder", "")
         self.filtermail_smtp_port = int(params["filtermail_smtp_port"])
+        self.filtermail_smtp_port_incoming = int(
+            params["filtermail_smtp_port_incoming"]
+        )
         self.postfix_reinject_port = int(params["postfix_reinject_port"])
+        self.postfix_reinject_port_incoming = int(
+            params["postfix_reinject_port_incoming"]
+        )
         self.mtail_address = params.get("mtail_address")
         self.disable_ipv6 = params.get("disable_ipv6", "false").lower() == "true"
+        self.acme_email = params.get("acme_email", "")
         self.imap_rawlog = params.get("imap_rawlog", "false").lower() == "true"
         if "iroh_relay" not in params:
             self.iroh_relay = "https://" + params["mail_domain"]
@@ -54,7 +67,7 @@ class Config:
     def _getbytefile(self):
         return open(self._inipath, "rb")
 
-    def get_user(self, addr):
+    def get_user(self, addr) -> User:
         if not addr or "@" not in addr or "/" in addr:
             raise ValueError(f"invalid address {addr!r}")
 
@@ -69,6 +82,11 @@ class Config:
 
 def write_initial_config(inipath, mail_domain, overrides):
     """Write out default config file, using the specified config value overrides."""
+    content = get_default_config_content(mail_domain, **overrides)
+    inipath.write_text(content)
+
+
+def get_default_config_content(mail_domain, **overrides):
     from importlib.resources import files
 
     inidir = files(__package__).joinpath("ini")
@@ -100,7 +118,7 @@ def write_initial_config(inipath, mail_domain, overrides):
         lines = []
         for line in content.split("\n"):
             for key, value in privacy.items():
-                value_lines = value.strip().split("\n")
+                value_lines = value.format(mail_domain=mail_domain).strip().split("\n")
                 if not line.startswith(f"{key} =") or not value_lines:
                     continue
                 if len(value_lines) == 1:
@@ -113,5 +131,4 @@ def write_initial_config(inipath, mail_domain, overrides):
             else:
                 lines.append(line)
         content = "\n".join(lines)
-
+    return content
-    inipath.write_text(content)

chatmaild/src/chatmaild/delete_inactive_users.py

@@ -1,31 +0,0 @@
-"""
-Remove inactive users
-"""
-
-import os
-import shutil
-import sys
-import time
-
-from .config import read_config
-
-
-def delete_inactive_users(config):
-    cutoff_date = time.time() - config.delete_inactive_users_after * 86400
-    for addr in os.listdir(config.mailboxes_dir):
-        try:
-            user = config.get_user(addr)
-        except ValueError:
-            continue
-
-        read_timestamp = user.get_last_login_timestamp()
-        if read_timestamp and read_timestamp < cutoff_date:
-            path = config.mailboxes_dir.joinpath(addr)
-            assert path == user.maildir
-            shutil.rmtree(path, ignore_errors=True)
-
-
-def main():
-    (cfgpath,) = sys.argv[1:]
-    config = read_config(cfgpath)
-    delete_inactive_users(config)

chatmaild/src/chatmaild/doveauth.py

@@ -1,9 +1,13 @@
-import crypt
 import json
 import logging
 import os
 import sys
 
+try:
+    import crypt_r
+except ImportError:
+    import crypt as crypt_r
+
 from .config import Config, read_config
 from .dictproxy import DictProxy
 from .migrate_db import migrate_from_db_to_maildir
@@ -13,7 +17,7 @@ NOCREATE_FILE = "/etc/chatmail-nocreate"
 
 def encrypt_password(password: str):
     # https://doc.dovecot.org/configuration_manual/authentication/password_schemes/
-    passhash = crypt.crypt(password, crypt.METHOD_SHA512)
+    passhash = crypt_r.crypt(password, crypt_r.METHOD_SHA512)
     return "{SHA512-CRYPT}" + passhash
 
 

chatmaild/src/chatmaild/echo.py

@@ -8,6 +8,7 @@ import logging
 import os
 import subprocess
 import sys
+from pathlib import Path
 
 from deltachat_rpc_client import Bot, DeltaChat, EventType, Rpc, events
 
@@ -97,6 +98,10 @@ def main():
         if not bot.is_configured():
             bot.configure(addr, password)
 
+        # write invite link to working directory
+        invitelink = bot.account.get_qr_code()
+        Path("invite-link.txt").write_text(invitelink)
+
         bot.run_forever()
 
 

chatmaild/src/chatmaild/expire.py

@@ -0,0 +1,218 @@
+"""
+Expire old messages and addresses.
+
+"""
+
+import os
+import shutil
+import sys
+import time
+from argparse import ArgumentParser
+from collections import namedtuple
+from datetime import datetime
+from stat import S_ISREG
+
+from chatmaild.config import read_config
+
+FileEntry = namedtuple("FileEntry", ("relpath", "mtime", "size"))
+
+
+def iter_mailboxes(basedir, maxnum):
+    if not os.path.exists(basedir):
+        print_info(f"no mailboxes found at: {basedir}")
+        return
+
+    for name in os_listdir_if_exists(basedir)[:maxnum]:
+        if "@" in name:
+            yield MailboxStat(basedir + "/" + name)
+
+
+def get_file_entry(path):
+    """return a FileEntry or None if the path does not exist or is not a regular file."""
+    try:
+        st = os.stat(path)
+    except FileNotFoundError:
+        return None
+    if not S_ISREG(st.st_mode):
+        return None
+    return FileEntry(path, st.st_mtime, st.st_size)
+
+
+def os_listdir_if_exists(path):
+    """return a list of names obtained from os.listdir or an empty list if the path does not exist."""
+    try:
+        return os.listdir(path)
+    except FileNotFoundError:
+        return []
+
+
+class MailboxStat:
+    last_login = None
+
+    def __init__(self, basedir):
+        self.basedir = str(basedir)
+        # all detected messages in cur/new/tmp folders
+        self.messages = []
+
+        # all detected files in mailbox top dir
+        self.extrafiles = []
+
+        # scan all relevant files (without recursion)
+        old_cwd = os.getcwd()
+        try:
+            os.chdir(self.basedir)
+        except FileNotFoundError:
+            return
+        for name in os_listdir_if_exists("."):
+            if name in ("cur", "new", "tmp"):
+                for msg_name in os_listdir_if_exists(name):
+                    entry = get_file_entry(f"{name}/{msg_name}")
+                    if entry is not None:
+                        self.messages.append(entry)
+
+            else:
+                entry = get_file_entry(name)
+                if entry is not None:
+                    self.extrafiles.append(entry)
+                    if name == "password":
+                        self.last_login = entry.mtime
+        self.extrafiles.sort(key=lambda x: -x.size)
+        os.chdir(old_cwd)
+
+
+def print_info(msg):
+    print(msg, file=sys.stderr)
+
+
+class Expiry:
+    def __init__(self, config, dry, now, verbose):
+        self.config = config
+        self.dry = dry
+        self.now = now
+        self.verbose = verbose
+        self.del_mboxes = 0
+        self.all_mboxes = 0
+        self.del_files = 0
+        self.all_files = 0
+        self.start = time.time()
+
+    def remove_mailbox(self, mboxdir):
+        if self.verbose:
+            print_info(f"removing {mboxdir}")
+        if not self.dry:
+            shutil.rmtree(mboxdir)
+        self.del_mboxes += 1
+
+    def remove_file(self, path, mtime=None):
+        if self.verbose:
+            if mtime is not None:
+                date = datetime.fromtimestamp(mtime).strftime("%b %d")
+                print_info(f"removing {date} {path}")
+            else:
+                print_info(f"removing {path}")
+        if not self.dry:
+            try:
+                os.unlink(path)
+            except FileNotFoundError:
+                print_info(f"file not found/vanished {path}")
+        self.del_files += 1
+
+    def process_mailbox_stat(self, mbox):
+        cutoff_without_login = (
+            self.now - int(self.config.delete_inactive_users_after) * 86400
+        )
+        cutoff_mails = self.now - int(self.config.delete_mails_after) * 86400
+        cutoff_large_mails = self.now - int(self.config.delete_large_after) * 86400
+
+        self.all_mboxes += 1
+        changed = False
+        if mbox.last_login and mbox.last_login < cutoff_without_login:
+            self.remove_mailbox(mbox.basedir)
+            return
+
+        # all to-be-removed files are relative to the mailbox basedir
+        try:
+            os.chdir(mbox.basedir)
+        except FileNotFoundError:
+            print_info(f"mailbox not found/vanished {mbox.basedir}")
+            return
+
+        mboxname = os.path.basename(mbox.basedir)
+        if self.verbose:
+            date = datetime.fromtimestamp(mbox.last_login) if mbox.last_login else None
+            if date:
+                print_info(f"checking mailbox {date.strftime('%b %d')} {mboxname}")
+            else:
+                print_info(f"checking mailbox (no last_login) {mboxname}")
+        self.all_files += len(mbox.messages)
+        for message in mbox.messages:
+            if message.mtime < cutoff_mails:
+                self.remove_file(message.relpath, mtime=message.mtime)
+            elif message.size > 200000 and message.mtime < cutoff_large_mails:
+                # we only remove noticed large files (not unnoticed ones in new/)
+                if message.relpath.startswith("cur/"):
+                    self.remove_file(message.relpath, mtime=message.mtime)
+            else:
+                continue
+            changed = True
+        if changed:
+            self.remove_file("maildirsize")
+
+    def get_summary(self):
+        return (
+            f"Removed {self.del_mboxes} out of {self.all_mboxes} mailboxes "
+            f"and {self.del_files} out of {self.all_files} files in existing mailboxes "
+            f"in {time.time() - self.start:2.2f} seconds"
+        )
+
+
+def main(args=None):
+    """Expire mailboxes and messages according to chatmail config"""
+    parser = ArgumentParser(description=main.__doc__)
+    ini = "/usr/local/lib/chatmaild/chatmail.ini"
+    parser.add_argument(
+        "chatmail_ini",
+        action="store",
+        nargs="?",
+        help=f"path pointing to chatmail.ini file, default: {ini}",
+        default=ini,
+    )
+    parser.add_argument(
+        "--days", action="store", help="assume date to be days older than now"
+    )
+
+    parser.add_argument(
+        "--maxnum",
+        default=None,
+        action="store",
+        help="maximum number of mailboxes to iterate on",
+    )
+    parser.add_argument(
+        "-v",
+        dest="verbose",
+        action="store_true",
+        help="print out removed files and mailboxes",
+    )
+
+    parser.add_argument(
+        "--remove",
+        dest="remove",
+        action="store_true",
+        help="actually remove all expired files and dirs",
+    )
+    args = parser.parse_args(args)
+
+    config = read_config(args.chatmail_ini)
+    now = datetime.utcnow().timestamp()
+    if args.days:
+        now = now - 86400 * int(args.days)
+
+    maxnum = int(args.maxnum) if args.maxnum else None
+    exp = Expiry(config, dry=not args.remove, now=now, verbose=args.verbose)
+    for mailbox in iter_mailboxes(str(config.mailboxes_dir), maxnum=maxnum):
+        exp.process_mailbox_stat(mailbox)
+    print(exp.get_summary())
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])

chatmaild/src/chatmaild/filtermail.py

@@ -2,7 +2,6 @@
 import asyncio
 import base64
 import binascii
-import logging
 import sys
 import time
 from email import policy
@@ -11,10 +10,12 @@ from email.utils import parseaddr
 from smtplib import SMTP as SMTPClient
 
 from aiosmtpd.controller import Controller
+from aiosmtpd.smtp import SMTP
 
-from .common_encrypted_subjects import common_encrypted_subjects
 from .config import read_config
 
+ENCRYPTION_NEEDED_523 = "523 Encryption Needed: Invalid Unencrypted Mail"
+
 
 def check_openpgp_payload(payload: bytes):
     """Checks the OpenPGP payload.
@@ -36,6 +37,12 @@ def check_openpgp_payload(payload: bytes):
 
         packet_type_id = payload[i] & 0x3F
         i += 1
+
+        while payload[i] >= 224 and payload[i] < 255:
+            # Partial body length.
+            partial_length = 1 << (payload[i] & 0x1F)
+            i += 1 + partial_length
+
         if payload[i] < 192:
             # One-octet length.
             body_len = payload[i]
@@ -54,7 +61,7 @@ def check_openpgp_payload(payload: bytes):
             )
             i += 5
         else:
-            # Partial body length is not allowed.
+            # Impossible, partial body length was processed above.
             return False
 
         i += body_len
@@ -75,17 +82,35 @@ def check_openpgp_payload(payload: bytes):
     return False
 
 
-def check_armored_payload(payload: str):
+def check_armored_payload(payload: str, outgoing: bool):
-    prefix = "-----BEGIN PGP MESSAGE-----\r\n\r\n"
+    """Check the armored PGP message for invalid content.
+
+    :param payload: the armored PGP message
+    :param outgoing: whether the message is outgoing or incoming
+    :return: whether the message is a valid PGP message
+    """
+    prefix = "-----BEGIN PGP MESSAGE-----\r\n"
     if not payload.startswith(prefix):
         return False
     payload = payload.removeprefix(prefix)
 
-    suffix = "-----END PGP MESSAGE-----\r\n\r\n"
+    while payload.endswith("\r\n"):
+        payload = payload.removesuffix("\r\n")
+    suffix = "-----END PGP MESSAGE-----"
     if not payload.endswith(suffix):
         return False
     payload = payload.removesuffix(suffix)
 
+    version_comment = "Version: "
+    if payload.startswith(version_comment):
+        if outgoing:  # Disallow comments in outgoing messages
+            return False
+        # Remove comments from incoming messages
+        payload = payload.partition("\r\n")[2]
+
+    while payload.startswith("\r\n"):
+        payload = payload.removeprefix("\r\n")
+
     # Remove CRC24.
     payload = payload.rpartition("=")[0]
 
@@ -100,15 +125,34 @@ def check_armored_payload(payload: str):
         return False
 
 
-def check_encrypted(message):
+def is_securejoin(message):
+    if message.get("secure-join") not in ["vc-request", "vg-request"]:
+        return False
+    if not message.is_multipart():
+        return False
+    parts_count = 0
+    for part in message.iter_parts():
+        parts_count += 1
+        if parts_count > 1:
+            return False
+        if part.is_multipart():
+            return False
+        if part.get_content_type() != "text/plain":
+            return False
+
+        payload = part.get_payload().strip().lower()
+        if payload not in ("secure-join: vc-request", "secure-join: vg-request"):
+            return False
+    return True
+
+
+def check_encrypted(message, outgoing=True):
     """Check that the message is an OpenPGP-encrypted message.
 
     MIME structure of the message must correspond to <https://www.rfc-editor.org/rfc/rfc3156>.
     """
     if not message.is_multipart():
         return False
-    if message.get("subject") not in common_encrypted_subjects:
-        return False
     if message.get_content_type() != "multipart/encrypted":
         return False
     parts_count = 0
@@ -129,7 +173,7 @@ def check_encrypted(message):
             if part.get_content_type() != "application/octet-stream":
                 return False
 
-            if not check_armored_payload(part.get_payload()):
+            if not check_armored_payload(part.get_payload(), outgoing=outgoing):
                 return False
         else:
             return False
@@ -137,9 +181,19 @@ def check_encrypted(message):
     return True
 
 
-async def asyncmain_beforequeue(config):
+async def asyncmain_beforequeue(config, mode):
-    port = config.filtermail_smtp_port
+    if mode == "outgoing":
-    Controller(BeforeQueueHandler(config), hostname="127.0.0.1", port=port).start()
+        port = config.filtermail_smtp_port
+        handler = OutgoingBeforeQueueHandler(config)
+    else:
+        port = config.filtermail_smtp_port_incoming
+        handler = IncomingBeforeQueueHandler(config)
+    HackedController(
+        handler,
+        hostname="127.0.0.1",
+        port=port,
+        data_size_limit=config.max_message_size,
+    ).start()
 
 
 def recipient_matches_passthrough(recipient, passthrough_recipients):
@@ -151,13 +205,29 @@ def recipient_matches_passthrough(recipient, passthrough_recipients):
     return False
 
 
-class BeforeQueueHandler:
+class HackedController(Controller):
+    def factory(self):
+        return SMTPDiscardRCPTO_options(self.handler, **self.SMTP_kwargs)
+
+
+class SMTPDiscardRCPTO_options(SMTP):
+    def _getparams(self, params):
+        # Ignore RCPT TO parameters.
+        #
+        # Otherwise parameters such as `ORCPT=...`
+        # or `NOTIFY=DELAY,FAILURE` (generated by Stalwart)
+        # make aiosmtpd reject the message here:
+        # <https://github.com/aio-libs/aiosmtpd/blob/98f578389ae86e5345cc343fa4e5a17b21d9c96d/aiosmtpd/smtp.py#L1379-L1384>
+        return {}
+
+
+class OutgoingBeforeQueueHandler:
     def __init__(self, config):
         self.config = config
         self.send_rate_limiter = SendRateLimiter()
 
     async def handle_MAIL(self, server, session, envelope, address, mail_options):
-        logging.info(f"handle_MAIL from {address}")
+        log_info(f"handle_MAIL from {address}")
         envelope.mail_from = address
         max_sent = self.config.max_user_send_per_minute
         if not self.send_rate_limiter.is_sending_allowed(address, max_sent):
@@ -170,61 +240,113 @@ class BeforeQueueHandler:
         return "250 OK"
 
     async def handle_DATA(self, server, session, envelope):
-        logging.info("handle_DATA before-queue")
+        loop = asyncio.get_running_loop()
+        return await loop.run_in_executor(None, self.sync_handle_DATA, envelope)
+
+    def sync_handle_DATA(self, envelope):
+        log_info("handle_DATA before-queue")
         error = self.check_DATA(envelope)
         if error:
             return error
-        logging.info("re-injecting the mail that passed checks")
+        log_info("re-injecting the mail that passed checks")
         client = SMTPClient("localhost", self.config.postfix_reinject_port)
-        client.sendmail(envelope.mail_from, envelope.rcpt_tos, envelope.content)
+        client.sendmail(
+            envelope.mail_from, envelope.rcpt_tos, envelope.original_content
+        )
         return "250 OK"
 
     def check_DATA(self, envelope):
         """the central filtering function for e-mails."""
-        logging.info(f"Processing DATA message from {envelope.mail_from}")
+        log_info(f"Processing DATA message from {envelope.mail_from}")
 
         message = BytesParser(policy=policy.default).parsebytes(envelope.content)
-        mail_encrypted = check_encrypted(message)
+        mail_encrypted = check_encrypted(message, outgoing=True)
 
         _, from_addr = parseaddr(message.get("from").strip())
-        envelope_from_domain = from_addr.split("@").pop()
 
-        logging.info(f"mime-from: {from_addr} envelope-from: {envelope.mail_from!r}")
         if envelope.mail_from.lower() != from_addr.lower():
             return f"500 Invalid FROM <{from_addr!r}> for <{envelope.mail_from!r}>"
 
-        if mail_encrypted:
+        if mail_encrypted or is_securejoin(message):
-            print("Filtering encrypted mail.", file=sys.stderr)
+            print("Outgoing: Filtering encrypted mail.", file=sys.stderr)
-        else:
+            return
-            print("Filtering unencrypted mail.", file=sys.stderr)
+
+        print("Outgoing: Filtering unencrypted mail.", file=sys.stderr)
 
         if envelope.mail_from in self.config.passthrough_senders:
             return
 
+        # allow self-sent Autocrypt Setup Message
+        if envelope.rcpt_tos == [from_addr]:
+            if message.get("subject") == "Autocrypt Setup Message":
+                if message.get_content_type() == "multipart/mixed":
+                    return
+
         passthrough_recipients = self.config.passthrough_recipients
 
-        is_securejoin = message.get("secure-join") in [
-            "vc-request",
-            "vg-request",
-        ]
-        if is_securejoin:
-            return
-
         for recipient in envelope.rcpt_tos:
-            if envelope.mail_from == recipient:
-                # Always allow sending emails to self.
-                continue
             if recipient_matches_passthrough(recipient, passthrough_recipients):
                 continue
-            res = recipient.split("@")
-            if len(res) != 2:
-                return f"500 Invalid address <{recipient}>"
-            _recipient_addr, recipient_domain = res
 
-            is_outgoing = recipient_domain != envelope_from_domain
+            print("Rejected unencrypted mail.", file=sys.stderr)
-            if is_outgoing and not mail_encrypted:
+            return ENCRYPTION_NEEDED_523
-                print("Rejected unencrypted mail.", file=sys.stderr)
+
-                return f"500 Invalid unencrypted mail to <{recipient}>"
+
+class IncomingBeforeQueueHandler:
+    def __init__(self, config):
+        self.config = config
+
+    async def handle_DATA(self, server, session, envelope):
+        loop = asyncio.get_running_loop()
+        return await loop.run_in_executor(None, self.sync_handle_DATA, envelope)
+
+    def sync_handle_DATA(self, envelope):
+        log_info("handle_DATA before-queue")
+        error = self.check_DATA(envelope)
+        if error:
+            return error
+        log_info("re-injecting the mail that passed checks")
+
+        # the smtp daemon on reinject_port_incoming gives it to dkim milter
+        # which looks at source address to determine whether to verify or sign
+        client = SMTPClient(
+            "localhost",
+            self.config.postfix_reinject_port_incoming,
+            source_address=("127.0.0.2", 0),
+        )
+        client.sendmail(
+            envelope.mail_from, envelope.rcpt_tos, envelope.original_content
+        )
+        return "250 OK"
+
+    def check_DATA(self, envelope):
+        """the central filtering function for e-mails."""
+        log_info(f"Processing DATA message from {envelope.mail_from}")
+
+        message = BytesParser(policy=policy.default).parsebytes(envelope.content)
+        mail_encrypted = check_encrypted(message, outgoing=False)
+
+        if mail_encrypted or is_securejoin(message):
+            print("Incoming: Filtering encrypted mail.", file=sys.stderr)
+            return
+
+        print("Incoming: Filtering unencrypted mail.", file=sys.stderr)
+
+        # we want cleartext mailer-daemon messages to pass through
+        # chatmail core will typically not display them as normal messages
+        if message.get("auto-submitted"):
+            _, from_addr = parseaddr(message.get("from").strip())
+            if from_addr.lower().startswith("mailer-daemon@"):
+                if message.get_content_type() == "multipart/report":
+                    return
+
+        for recipient in envelope.rcpt_tos:
+            user = self.config.get_user(recipient)
+            if user is None or user.is_incoming_cleartext_ok():
+                continue
+
+            print("Rejected unencrypted mail.", file=sys.stderr)
+            return ENCRYPTION_NEEDED_523
 
 
 class SendRateLimiter:
@@ -241,13 +363,19 @@ class SendRateLimiter:
         return False
 
 
+def log_info(msg):
+    print(msg, file=sys.stderr)
+
+
 def main():
     args = sys.argv[1:]
-    assert len(args) == 1
+    assert len(args) == 2
     config = read_config(args[0])
-    logging.basicConfig(level=logging.WARN)
+    mode = args[1]
     loop = asyncio.new_event_loop()
     asyncio.set_event_loop(loop)
-    task = asyncmain_beforequeue(config)
+    assert mode in ["incoming", "outgoing"]
+    task = asyncmain_beforequeue(config, mode)
     loop.create_task(task)
+    log_info("entering serving loop")
     loop.run_forever()

chatmaild/src/chatmaild/fsreport.py

@@ -0,0 +1,168 @@
+"""
+command line tool to analyze mailbox message storage
+
+example invocation:
+
+    python -m chatmaild.fsreport /path/to/chatmail.ini
+
+to show storage summaries for all "cur" folders
+
+    python -m chatmaild.fsreport /path/to/chatmail.ini --mdir cur
+
+to show storage summaries only for first 1000 mailboxes
+
+    python -m chatmaild.fsreport /path/to/chatmail.ini --maxnum 1000
+
+"""
+
+import os
+from argparse import ArgumentParser
+from datetime import datetime
+
+from chatmaild.config import read_config
+from chatmaild.expire import iter_mailboxes
+
+DAYSECONDS = 24 * 60 * 60
+MONTHSECONDS = DAYSECONDS * 30
+
+
+def HSize(size: int):
+    """Format a size integer as a Human-readable string Kilobyte, Megabyte or Gigabyte"""
+    if size < 10000:
+        return f"{size / 1000:5.2f}K"
+    if size < 1000 * 1000:
+        return f"{size / 1000:5.0f}K"
+    if size < 1000 * 1000 * 1000:
+        return f"{int(size / 1000000):5.0f}M"
+    return f"{size / 1000000000:5.2f}G"
+
+
+class Report:
+    def __init__(self, now, min_login_age, mdir):
+        self.size_extra = 0
+        self.size_messages = 0
+        self.now = now
+        self.min_login_age = min_login_age
+        self.mdir = mdir
+
+        self.num_ci_logins = self.num_all_logins = 0
+        self.login_buckets = {x: 0 for x in (1, 10, 30, 40, 80, 100, 150)}
+
+        self.message_buckets = {x: 0 for x in (0, 160000, 500000, 2000000)}
+
+    def process_mailbox_stat(self, mailbox):
+        # categorize login times
+        last_login = mailbox.last_login
+        if last_login:
+            self.num_all_logins += 1
+            if os.path.basename(mailbox.basedir)[:3] == "ci-":
+                self.num_ci_logins += 1
+            else:
+                for days in self.login_buckets:
+                    if last_login >= self.now - days * DAYSECONDS:
+                        self.login_buckets[days] += 1
+
+        cutoff_login_date = self.now - self.min_login_age * DAYSECONDS
+        if last_login and last_login <= cutoff_login_date:
+            # categorize message sizes
+            for size in self.message_buckets:
+                for msg in mailbox.messages:
+                    if msg.size >= size:
+                        if self.mdir and not msg.relpath.startswith(self.mdir):
+                            continue
+                        self.message_buckets[size] += msg.size
+
+        self.size_messages += sum(entry.size for entry in mailbox.messages)
+        self.size_extra += sum(entry.size for entry in mailbox.extrafiles)
+
+    def dump_summary(self):
+        all_messages = self.size_messages
+        print()
+        print("## Mailbox storage use analysis")
+        print(f"Mailbox data total size: {HSize(self.size_extra + all_messages)}")
+        print(f"Messages total size    : {HSize(all_messages)}")
+        try:
+            percent = self.size_extra / (self.size_extra + all_messages) * 100
+        except ZeroDivisionError:
+            percent = 100
+        print(f"Extra files : {HSize(self.size_extra)} ({percent:.2f}%)")
+
+        print()
+        if self.min_login_age:
+            print(f"### Message storage for {self.min_login_age} days old logins")
+
+        pref = f"[{self.mdir}] " if self.mdir else ""
+        for minsize, sumsize in self.message_buckets.items():
+            percent = (sumsize / all_messages * 100) if all_messages else 0
+            print(
+                f"{pref}larger than {HSize(minsize)}: {HSize(sumsize)} ({percent:.2f}%)"
+            )
+
+        user_logins = self.num_all_logins - self.num_ci_logins
+
+        def p(num):
+            return f"({num / user_logins * 100:2.2f}%)" if user_logins else "100%"
+
+        print()
+        print(f"## Login stats, from date reference {datetime.fromtimestamp(self.now)}")
+        print(f"all:     {HSize(self.num_all_logins)}")
+        print(f"non-ci:  {HSize(user_logins)}")
+        print(f"ci:      {HSize(self.num_ci_logins)}")
+        for days, active in self.login_buckets.items():
+            print(f"last {days:3} days: {HSize(active)} {p(active)}")
+
+
+def main(args=None):
+    """Report about filesystem storage usage of all mailboxes and messages"""
+    parser = ArgumentParser(description=main.__doc__)
+    ini = "/usr/local/lib/chatmaild/chatmail.ini"
+    parser.add_argument(
+        "chatmail_ini",
+        action="store",
+        nargs="?",
+        help=f"path pointing to chatmail.ini file, default: {ini}",
+        default=ini,
+    )
+    parser.add_argument(
+        "--days",
+        default=0,
+        action="store",
+        help="assume date to be days older than now",
+    )
+    parser.add_argument(
+        "--min-login-age",
+        default=0,
+        dest="min_login_age",
+        action="store",
+        help="only sum up message size if last login is at least min-login-age days old",
+    )
+    parser.add_argument(
+        "--mdir",
+        action="store",
+        help="only consider 'cur' or 'new' or 'tmp' messages for summary",
+    )
+
+    parser.add_argument(
+        "--maxnum",
+        default=None,
+        action="store",
+        help="maximum number of mailboxes to iterate on",
+    )
+
+    args = parser.parse_args(args)
+
+    config = read_config(args.chatmail_ini)
+
+    now = datetime.utcnow().timestamp()
+    if args.days:
+        now = now - 86400 * int(args.days)
+
+    maxnum = int(args.maxnum) if args.maxnum else None
+    rep = Report(now=now, min_login_age=int(args.min_login_age), mdir=args.mdir)
+    for mbox in iter_mailboxes(str(config.mailboxes_dir), maxnum=maxnum):
+        rep.process_mailbox_stat(mbox)
+    rep.dump_summary()
+
+
+if __name__ == "__main__":
+    main()

chatmaild/src/chatmaild/ini/chatmail.ini.f

@@ -23,6 +23,9 @@ max_message_size = 31457280
 # days after which mails are unconditionally deleted
 delete_mails_after = 20
 
+# days after which large messages (>200k) are unconditionally deleted
+delete_large_after = 7
+
 # days after which users without a successful login are deleted (database and mails)
 delete_inactive_users_after = 90
 
@@ -40,21 +43,29 @@ passthrough_senders =
 
 # list of e-mail recipients for which to accept outbound un-encrypted mails
 # (space-separated, item may start with "@" to whitelist whole recipient domains)
-passthrough_recipients = xstore@testrun.org 
+passthrough_recipients = echo@{mail_domain}
+
+# path to www directory - documented here: https://github.com/chatmail/relay/#custom-web-pages
+#www_folder = www
 
 #
 # Deployment Details
 #
 
-# where the filtermail SMTP service listens
+# SMTP outgoing filtermail and reinjection 
 filtermail_smtp_port = 10080
-
-# postfix accepts on the localhost reinject SMTP port
 postfix_reinject_port = 10025
 
+# SMTP incoming filtermail and reinjection 
+filtermail_smtp_port_incoming = 10081
+postfix_reinject_port_incoming = 10026
+
 # if set to "True" IPv6 is disabled
 disable_ipv6 = False
 
+# Your email adress, which will be used in acmetool to manage Let's Encrypt SSL certificates
+acme_email = 
+
 # Defaults to https://iroh.{{mail_domain}} and running `iroh-relay` on the chatmail
 # service.
 # If you set it to anything else, the service will be disabled

chatmaild/src/chatmaild/ini/override-testrun.ini

@@ -1,7 +1,7 @@
 
 [privacy]
 
-passthrough_recipients = privacy@testrun.org xstore@testrun.org
+passthrough_recipients = privacy@testrun.org echo@{mail_domain}
 
 privacy_postal =
     Merlinux GmbH, Represented by the managing director H. Krekel,

chatmaild/src/chatmaild/metadata.py

@@ -1,14 +1,24 @@
 import logging
 import sys
+import time
+from contextlib import contextmanager
 
 from .config import read_config
 from .dictproxy import DictProxy
 from .filedict import FileDict
 from .notifier import Notifier
+from .turnserver import turn_credentials
+
+
+def _is_valid_token_timestamp(timestamp, now):
+    # Token if invalid after 90 days
+    # or if the timestamp is in the future.
+    return timestamp > now - 3600 * 24 * 90 and timestamp < now + 60
 
 
 class Metadata:
-    # each SETMETADATA on this key appends to a list of unique device tokens
+    # each SETMETADATA on this key appends to dictionary
+    # mapping of unique device tokens
     # which only ever get removed if the upstream indicates the token is invalid
     DEVICETOKEN_KEY = "devicetoken"
 
@@ -18,29 +28,60 @@ class Metadata:
     def get_metadata_dict(self, addr):
         return FileDict(self.vmail_dir / addr / "metadata.json")
 
-    def add_token_to_addr(self, addr, token):
+    @contextmanager
+    def _modify_tokens(self, addr):
         with self.get_metadata_dict(addr).modify() as data:
-            tokens = data.setdefault(self.DEVICETOKEN_KEY, [])
+            tokens = data.setdefault(self.DEVICETOKEN_KEY, {})
-            if token not in tokens:
+            now = int(time.time())
-                tokens.append(token)
+            if isinstance(tokens, list):
+                data[self.DEVICETOKEN_KEY] = tokens = {t: now for t in tokens}
+
+            expired_tokens = [
+                token
+                for token, timestamp in tokens.items()
+                if not _is_valid_token_timestamp(tokens[token], now)
+            ]
+            for expired_token in expired_tokens:
+                del tokens[expired_token]
+
+            yield tokens
+
+    def add_token_to_addr(self, addr, token):
+        with self._modify_tokens(addr) as tokens:
+            tokens[token] = int(time.time())
 
     def remove_token_from_addr(self, addr, token):
-        with self.get_metadata_dict(addr).modify() as data:
+        with self._modify_tokens(addr) as tokens:
-            tokens = data.get(self.DEVICETOKEN_KEY, [])
             if token in tokens:
-                tokens.remove(token)
+                del tokens[token]
 
     def get_tokens_for_addr(self, addr):
         mdict = self.get_metadata_dict(addr).read()
-        return mdict.get(self.DEVICETOKEN_KEY, [])
+        tokens = mdict.get(self.DEVICETOKEN_KEY, {})
+
+        now = int(time.time())
+        if isinstance(tokens, dict):
+            token_list = [
+                token
+                for token, timestamp in tokens.items()
+                if _is_valid_token_timestamp(timestamp, now)
+            ]
+            if len(token_list) < len(tokens):
+                # Some tokens have expired, remove them.
+                with self._modify_tokens(addr) as _tokens:
+                    pass
+        else:
+            token_list = []
+        return token_list
 
 
 class MetadataDictProxy(DictProxy):
-    def __init__(self, notifier, metadata, iroh_relay=None):
+    def __init__(self, notifier, metadata, iroh_relay=None, turn_hostname=None):
         super().__init__()
         self.notifier = notifier
         self.metadata = metadata
         self.iroh_relay = iroh_relay
+        self.turn_hostname = turn_hostname
 
     def handle_lookup(self, parts):
         # Lpriv/43f5f508a7ea0366dff30200c15250e3/devicetoken\tlkj123poi@c2.testrun.org
@@ -59,6 +100,11 @@ class MetadataDictProxy(DictProxy):
             ):
                 # Handle `GETMETADATA "" /shared/vendor/deltachat/irohrelay`
                 return f"O{self.iroh_relay}\n"
+            elif keyname == "vendor/vendor.dovecot/pvt/server/vendor/deltachat/turn":
+                res = turn_credentials()
+                port = 3478
+                return f"O{self.turn_hostname}:{port}:{res}\n"
+
         logging.warning(f"lookup ignored: {parts!r}")
         return "N\n"
 
@@ -82,6 +128,7 @@ def main():
 
     config = read_config(config_path)
     iroh_relay = config.iroh_relay
+    mail_domain = config.mail_domain
 
     vmail_dir = config.mailboxes_dir
     if not vmail_dir.exists():
@@ -95,7 +142,10 @@ def main():
     notifier.start_notification_threads(metadata.remove_token_from_addr)
 
     dictproxy = MetadataDictProxy(
-        notifier=notifier, metadata=metadata, iroh_relay=iroh_relay
+        notifier=notifier,
+        metadata=metadata,
+        iroh_relay=iroh_relay,
+        turn_hostname=mail_domain,
     )
 
     dictproxy.serve_forever_from_socket(socket)

chatmaild/src/chatmaild/metrics.py

@@ -11,6 +11,8 @@ def main(vmail_dir=None):
     ci_accounts = 0
 
     for path in Path(vmail_dir).iterdir():
+        if not path.joinpath("cur").is_dir():
+            continue
         accounts += 1
         if path.name[:3] in ("ci-", "ac_"):
             ci_accounts += 1

chatmaild/src/chatmaild/migrate_db.py

@@ -32,7 +32,7 @@ def migrate_from_db_to_maildir(config, chunking=10000):
     # don't transfer special/CI accounts
     rows = [row for row in all_rows if row[0][:3] not in ("ci-", "ac_")]
 
-    logging.info(f"ignoring {len(all_rows)-len(rows)} CI accounts")
+    logging.info(f"ignoring {len(all_rows) - len(rows)} CI accounts")
     logging.info(f"migrating {len(rows)} sqlite database passwords to user dirs")
 
     for i, row in enumerate(rows):

chatmaild/src/chatmaild/newemail.py

@@ -15,7 +15,7 @@ ALPHANUMERIC_PUNCT = string.ascii_letters + string.digits + string.punctuation
 
 
 def create_newemail_dict(config: Config):
-    user = "".join(random.choices(ALPHANUMERIC, k=config.username_min_length))
+    user = "".join(random.choices(ALPHANUMERIC, k=config.username_max_length))
     password = "".join(
         secrets.choice(ALPHANUMERIC_PUNCT)
         for _ in range(config.password_min_length + 3)

chatmaild/src/chatmaild/notifier.py

@@ -17,11 +17,11 @@ and which are scheduled for retry using exponential back-off timing.
 If a token notification would be scheduled more than DROP_DEADLINE seconds
 after its first attempt, it is dropped with a log error.
 
-Note that tokens are completely opaque to the notification machinery here
+Note that tokens are opaque to the notification machinery here
-and will in the future be encrypted foreclosing all ability to distinguish
+and are encrypted foreclosing all ability to distinguish
 which device token ultimately goes to which phone-provider notification service,
 or to understand the relation of "device tokens" and chatmail addresses.
-The meaning and format of tokens is basically a matter of Delta-Chat Core and
+The meaning and format of tokens is basically a matter of chatmail Core and
 the `notification.delta.chat` service.
 """
 
@@ -95,7 +95,12 @@ class Notifier:
                 logging.warning(f"removing spurious queue item: {queue_path!r}")
                 queue_path.unlink()
                 continue
-            queue_item = PersistentQueueItem.read_from_path(queue_path)
+            try:
+                queue_item = PersistentQueueItem.read_from_path(queue_path)
+            except ValueError:
+                logging.warning(f"removing spurious queue item: {queue_path!r}")
+                queue_path.unlink()
+                continue
             self.queue_for_retry(queue_item)
 
     def queue_for_retry(self, queue_item, retry_num=0):

chatmaild/src/chatmaild/tests/mail-data/asm.eml

@@ -0,0 +1,56 @@
+From: {from_addr}
+To: {to_addr}
+Autocrypt-Setup-Message: v1
+Subject: Autocrypt Setup Message
+Date: Tue, 22 Jan 2019 12:56:29 +0100
+Content-type: multipart/mixed; boundary="Y6fyGi9SoGeH8WwRaEdC6bbBcYOedDzrQ"
+
+--Y6fyGi9SoGeH8WwRaEdC6bbBcYOedDzrQ
+Content-Type: text/plain
+
+This message contains all information to transfer your Autocrypt
+settings along with your secret key securely from your original
+device.
+
+To set up your new device for Autocrypt, please follow the
+instuctions that should be presented by your new device.
+
+You can keep this message and use it as a backup for your secret
+key. If you want to do this, you should write down the Setup Code
+and store it securely.
+--Y6fyGi9SoGeH8WwRaEdC6bbBcYOedDzrQ
+Content-Type: application/autocrypt-setup
+Content-Disposition: attachment; filename="autocrypt-setup-message.html"
+
+<html><body>
+<p>
+This is the Autocrypt setup file used to transfer settings and
+keys between clients. You can decrypt it using the Setup Code
+presented on your old device, and then import the contained key
+into your keyring.
+</p>
+
+<pre>
+-----BEGIN PGP MESSAGE-----
+Passphrase-Format: numeric9x4
+Passphrase-Begin: 17
+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+=pulM
+-----END PGP MESSAGE-----
+</pre></body></html>
+--Y6fyGi9SoGeH8WwRaEdC6bbBcYOedDzrQ--

chatmaild/src/chatmaild/tests/mail-data/mailer-daemon.eml

@@ -0,0 +1,46 @@
+Date: Fri, 8 Jul 1994 09:21:47 -0400
+From: Mail Delivery Subsystem <MAILER-DAEMON@example.org>
+Subject: Returned mail: User unknown
+To: <owner-ups-mib@CS.UTK.EDU>
+Auto-Submitted: auto-replied 
+MIME-Version: 1.0
+Content-Type: multipart/report; report-type=delivery-status;
+      boundary="JAA13167.773673707/CS.UTK.EDU"
+
+--JAA13167.773673707/CS.UTK.EDU
+content-type: text/plain; charset=us-ascii
+
+   ----- The following addresses had delivery problems -----
+<arathib@vnet.ibm.com>  (unrecoverable error)
+<wsnell@sdcc13.ucsd.edu>  (unrecoverable error)
+
+--JAA13167.773673707/CS.UTK.EDU
+content-type: message/delivery-status
+
+Reporting-MTA: dns; cs.utk.edu
+
+Original-Recipient: rfc822;arathib@vnet.ibm.com
+Final-Recipient: rfc822;arathib@vnet.ibm.com
+Action: failed
+Status: 5.0.0 (permanent failure)
+Diagnostic-Code: smtp;
+ 550 'arathib@vnet.IBM.COM' is not a registered gateway user
+Remote-MTA: dns; vnet.ibm.com
+
+Original-Recipient: rfc822;johnh@hpnjld.njd.hp.com
+Final-Recipient: rfc822;johnh@hpnjld.njd.hp.com
+Action: delayed
+Status: 4.0.0 (hpnjld.njd.jp.com: host name lookup failure)
+
+Original-Recipient: rfc822;wsnell@sdcc13.ucsd.edu
+Final-Recipient: rfc822;wsnell@sdcc13.ucsd.edu
+Action: failed
+Status: 5.0.0
+Diagnostic-Code: smtp; 550 user unknown
+Remote-MTA: dns; sdcc13.ucsd.edu
+
+--JAA13167.773673707/CS.UTK.EDU
+content-type: message/rfc822
+
+[original message goes here]
+--JAA13167.773673707/CS.UTK.EDU--

chatmaild/src/chatmaild/tests/mail-data/securejoin-vc-fake.eml

@@ -0,0 +1,21 @@
+Subject: Message from {from_addr}
+From: <{from_addr}>
+To: <{to_addr}>
+Date: Sun, 15 Oct 2023 16:43:25 +0000
+Message-ID: <Mr.78MWtlV7RAi.goCFzBhCYfy@c2.testrun.org>
+Chat-Version: 1.0
+Secure-Join: vc-request
+Secure-Join-Invitenumber: RANDOM-TOKEN
+MIME-Version: 1.0
+Content-Type: multipart/mixed; boundary="Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi"
+
+
+--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi
+Content-Type: text/plain; charset=utf-8
+
+Buy viagra!
+
+
+--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi--
+
+

chatmaild/src/chatmaild/tests/mail-data/securejoin-vc.eml

@@ -0,0 +1,21 @@
+Subject: Message from {from_addr}
+From: <{from_addr}>
+To: <{to_addr}>
+Date: Sun, 15 Oct 2023 16:43:25 +0000
+Message-ID: <Mr.78MWtlV7RAi.goCFzBhCYfy@c2.testrun.org>
+Chat-Version: 1.0
+Secure-Join: vc-request
+Secure-Join-Invitenumber: RANDOM-TOKEN
+MIME-Version: 1.0
+Content-Type: multipart/mixed; boundary="Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi"
+
+
+--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi
+Content-Type: text/plain; charset=utf-8
+
+Secure-Join: vc-request
+
+
+--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi--
+
+

chatmaild/src/chatmaild/tests/plugin.py

@@ -69,12 +69,11 @@ def maildata(request):
 
     assert datadir.exists(), datadir
 
-    def maildata(name, from_addr, to_addr, subject="..."):
+    def maildata(name, from_addr, to_addr, subject="[...]"):
         # Using `.read_bytes().decode()` instead of `.read_text()` to preserve newlines.
         data = datadir.joinpath(name).read_bytes().decode()
-
         text = data.format(from_addr=from_addr, to_addr=to_addr, subject=subject)
-        return BytesParser(policy=policy.default).parsebytes(text.encode())
+        return BytesParser(policy=policy.SMTP).parsebytes(text.encode())
 
     return maildata
 

chatmaild/src/chatmaild/tests/test_config.py

@@ -15,6 +15,14 @@ def test_read_config_basic(example_config):
     assert example_config.mail_domain == "chat.example.org"
 
 
+def test_read_config_basic_using_defaults(tmp_path, maildomain):
+    inipath = tmp_path.joinpath("chatmail.ini")
+    inipath.write_text(f"[params]\nmail_domain = {maildomain}")
+    example_config = read_config(inipath)
+    assert example_config.max_user_send_per_minute == 60
+    assert example_config.filtermail_smtp_port_incoming == 10081
+
+
 def test_read_config_testrun(make_config):
     config = make_config("something.testrun.org")
     assert config.mail_domain == "something.testrun.org"
@@ -27,6 +35,7 @@ def test_read_config_testrun(make_config):
     assert config.max_user_send_per_minute == 60
     assert config.max_mailbox_size == "100M"
     assert config.delete_mails_after == "20"
+    assert config.delete_large_after == "7"
     assert config.username_min_length == 9
     assert config.username_max_length == 9
     assert config.password_min_length == 9

chatmaild/src/chatmaild/tests/test_delete_inactive_users.py

@@ -1,7 +1,7 @@
 import time
 
-from chatmaild.delete_inactive_users import delete_inactive_users
 from chatmaild.doveauth import AuthDictProxy
+from chatmaild.expire import main as main_expire
 
 
 def test_login_timestamps(example_config):
@@ -45,7 +45,12 @@ def test_delete_inactive_users(example_config):
     for addr in to_remove:
         assert example_config.get_user(addr).maildir.exists()
 
-    delete_inactive_users(example_config)
+    main_expire(
+        args=[
+            "--remove",
+            str(example_config._inipath),
+        ]
+    )
 
     for p in example_config.mailboxes_dir.iterdir():
         assert not p.name.startswith("old")

chatmaild/src/chatmaild/tests/test_expire.py

@@ -0,0 +1,150 @@
+import os
+import random
+from datetime import datetime
+from fnmatch import fnmatch
+from pathlib import Path
+
+import pytest
+
+from chatmaild.expire import (
+    FileEntry,
+    MailboxStat,
+    get_file_entry,
+    iter_mailboxes,
+    os_listdir_if_exists,
+)
+from chatmaild.expire import main as expiry_main
+from chatmaild.fsreport import main as report_main
+
+
+def fill_mbox(basedir):
+    basedir1 = basedir.joinpath("mailbox1@example.org")
+    basedir1.mkdir()
+    password = basedir1.joinpath("password")
+    password.write_text("xxx")
+    basedir1.joinpath("maildirsize").write_text("xxx")
+
+    garbagedir = basedir1.joinpath("garbagedir")
+    garbagedir.mkdir()
+
+    create_new_messages(basedir1, ["cur/msg1"], size=500)
+    create_new_messages(basedir1, ["new/msg2"], size=600)
+    return basedir1
+
+
+def create_new_messages(basedir, relpaths, size=1000, days=0):
+    now = datetime.utcnow().timestamp()
+
+    for relpath in relpaths:
+        msg_path = Path(basedir).joinpath(relpath)
+        msg_path.parent.mkdir(parents=True, exist_ok=True)
+        msg_path.write_text("x" * size)
+        # accessed now, modified N days ago
+        os.utime(msg_path, (now, now - days * 86400))
+
+
+@pytest.fixture
+def mbox1(example_config):
+    basedir1 = fill_mbox(example_config.mailboxes_dir)
+    return MailboxStat(basedir1)
+
+
+def test_filentry_ordering(tmp_path):
+    l = [FileEntry(f"x{i}", size=i + 10, mtime=1000 - i) for i in range(10)]
+    sorted = list(l)
+    random.shuffle(l)
+    l.sort(key=lambda x: x.size)
+    assert l == sorted
+
+
+def test_no_mailbxoes(tmp_path, capsys):
+    assert [] == list(iter_mailboxes(str(tmp_path.joinpath("notexists")), maxnum=10))
+    out, err = capsys.readouterr()
+    assert "no mailboxes" in err
+
+
+def test_stats_mailbox(mbox1):
+    password = Path(mbox1.basedir).joinpath("password")
+    assert mbox1.last_login == password.stat().st_mtime
+    assert len(mbox1.messages) == 2
+
+    msgs = list(sorted(mbox1.messages, key=lambda x: x.size))
+    assert len(msgs) == 2
+    assert msgs[0].size == 500  # cur
+    assert msgs[1].size == 600  # new
+
+    create_new_messages(mbox1.basedir, ["large-extra"], size=1000)
+    create_new_messages(mbox1.basedir, ["index-something"], size=3)
+    mbox2 = MailboxStat(mbox1.basedir)
+    assert len(mbox2.extrafiles) == 4
+    assert mbox2.extrafiles[0].size == 1000
+
+    # cope well with mailbox dirs that have no password (for whatever reason)
+    Path(mbox1.basedir).joinpath("password").unlink()
+    mbox3 = MailboxStat(mbox1.basedir)
+    assert mbox3.last_login is None
+
+
+def test_report_no_mailboxes(example_config):
+    args = (str(example_config._inipath),)
+    report_main(args)
+
+
+def test_report(mbox1, example_config):
+    args = (str(example_config._inipath),)
+    report_main(args)
+    args = list(args) + "--days 1".split()
+    report_main(args)
+    args = list(args) + "--min-login-age 1".split()
+    report_main(args)
+    args = list(args) + "--mdir cur".split()
+    report_main(args)
+
+
+def test_expiry_cli_basic(example_config, mbox1):
+    args = (str(example_config._inipath),)
+    expiry_main(args)
+
+
+def test_expiry_cli_old_files(capsys, example_config, mbox1):
+    relpaths_old = ["cur/msg_old1", "cur/msg_old1"]
+    cutoff_days = int(example_config.delete_mails_after) + 1
+    create_new_messages(mbox1.basedir, relpaths_old, size=1000, days=cutoff_days)
+
+    relpaths_large = ["cur/msg_old_large1", "new/msg_old_large2"]
+    cutoff_days = int(example_config.delete_large_after) + 1
+    create_new_messages(
+        mbox1.basedir, relpaths_large, size=1000 * 300, days=cutoff_days
+    )
+
+    create_new_messages(mbox1.basedir, ["cur/shouldstay"], size=1000 * 300, days=1)
+
+    args = str(example_config._inipath), "--remove", "-v"
+    expiry_main(args)
+    out, err = capsys.readouterr()
+
+    allpaths = relpaths_old + relpaths_large + ["maildirsize"]
+    for path in allpaths:
+        for line in err.split("\n"):
+            if fnmatch(line, f"removing*{path}"):
+                break
+        else:
+            if path != "new/msg_old_large2":
+                pytest.fail(f"failed to remove {path}\n{err}")
+
+    assert "shouldstay" not in err
+
+
+def test_get_file_entry(tmp_path):
+    assert get_file_entry(str(tmp_path.joinpath("123123"))) is None
+    p = tmp_path.joinpath("x")
+    p.write_text("hello")
+    entry = get_file_entry(str(p))
+    assert entry.size == 5
+    assert entry.mtime
+
+
+def test_os_listdir_if_exists(tmp_path):
+    tmp_path.joinpath("x").write_text("hello")
+    assert len(os_listdir_if_exists(str(tmp_path))) == 1
+    assert len(os_listdir_if_exists(str(tmp_path.joinpath("123123")))) == 0

chatmaild/src/chatmaild/tests/test_filtermail.py

@@ -1,11 +1,12 @@
 import pytest
 
 from chatmaild.filtermail import (
-    BeforeQueueHandler,
+    IncomingBeforeQueueHandler,
+    OutgoingBeforeQueueHandler,
     SendRateLimiter,
     check_armored_payload,
     check_encrypted,
-    common_encrypted_subjects,
+    is_securejoin,
 )
 
 
@@ -18,7 +19,13 @@ def maildomain():
 @pytest.fixture
 def handler(make_config, maildomain):
     config = make_config(maildomain)
-    return BeforeQueueHandler(config)
+    return OutgoingBeforeQueueHandler(config)
+
+
+@pytest.fixture
+def inhandler(make_config, maildomain):
+    config = make_config(maildomain)
+    return IncomingBeforeQueueHandler(config)
 
 
 def test_reject_forged_from(maildata, gencreds, handler):
@@ -29,14 +36,14 @@ def test_reject_forged_from(maildata, gencreds, handler):
     # test that the filter lets good mail through
     to_addr = gencreds()[0]
     env.content = maildata(
-        "plain.eml", from_addr=env.mail_from, to_addr=to_addr
+        "encrypted.eml", from_addr=env.mail_from, to_addr=to_addr
     ).as_bytes()
 
     assert not handler.check_DATA(envelope=env)
 
     # test that the filter rejects forged mail
     env.content = maildata(
-        "plain.eml", from_addr="forged@c3.testrun.org", to_addr=to_addr
+        "encrypted.eml", from_addr="forged@c3.testrun.org", to_addr=to_addr
     ).as_bytes()
     error = handler.check_DATA(envelope=env)
     assert "500" in error
@@ -55,19 +62,28 @@ def test_filtermail_no_encryption_detection(maildata):
     assert not check_encrypted(msg)
 
 
-def test_filtermail_encryption_detection(maildata):
+def test_filtermail_securejoin_detection(maildata):
-    for subject in common_encrypted_subjects:
+    msg = maildata(
-        msg = maildata(
+        "securejoin-vc.eml", from_addr="some@example.org", to_addr="other@example.org"
-            "encrypted.eml",
+    )
-            from_addr="1@example.org",
+    assert is_securejoin(msg)
-            to_addr="2@example.org",
-            subject=subject,
-        )
-        assert check_encrypted(msg)
 
-    # if the subject is not a known encrypted subject value, it is not considered ac-encrypted
+    msg = maildata(
-    msg.replace_header("Subject", "Click this link")
+        "securejoin-vc-fake.eml",
-    assert not check_encrypted(msg)
+        from_addr="some@example.org",
+        to_addr="other@example.org",
+    )
+    assert not is_securejoin(msg)
+
+
+def test_filtermail_encryption_detection(maildata):
+    msg = maildata(
+        "encrypted.eml",
+        from_addr="1@example.org",
+        to_addr="2@example.org",
+        subject="Subject does not matter, will be replaced anyway",
+    )
+    assert check_encrypted(msg)
 
 
 def test_filtermail_no_literal_packets(maildata):
@@ -97,7 +113,7 @@ def test_send_rate_limiter():
             break
 
 
-def test_excempt_privacy(maildata, gencreds, handler):
+def test_cleartext_excempt_privacy(maildata, gencreds, handler):
     from_addr = gencreds()[0]
     to_addr = "privacy@testrun.org"
     handler.config.passthrough_recipients = [to_addr]
@@ -118,10 +134,73 @@ def test_excempt_privacy(maildata, gencreds, handler):
         rcpt_tos = [to_addr, false_to]
         content = msg.as_bytes()
 
-    assert "500" in handler.check_DATA(envelope=env2)
+    assert "523" in handler.check_DATA(envelope=env2)
 
 
-def test_passthrough_domains(maildata, gencreds, handler):
+def test_cleartext_self_send_autocrypt_setup_message(maildata, gencreds, handler):
+    from_addr = gencreds()[0]
+    to_addr = from_addr
+
+    msg = maildata("asm.eml", from_addr=from_addr, to_addr=to_addr)
+
+    class env:
+        mail_from = from_addr
+        rcpt_tos = [to_addr]
+        content = msg.as_bytes()
+
+    assert not handler.check_DATA(envelope=env)
+
+
+def test_cleartext_send_fails(maildata, gencreds, handler):
+    from_addr = gencreds()[0]
+    to_addr = gencreds()[0]
+
+    msg = maildata("plain.eml", from_addr=from_addr, to_addr=to_addr)
+
+    class env:
+        mail_from = from_addr
+        rcpt_tos = [to_addr]
+        content = msg.as_bytes()
+
+    res = handler.check_DATA(envelope=env)
+    assert "523 Encryption Needed" in res
+
+
+def test_cleartext_incoming_fails(maildata, gencreds, inhandler):
+    from_addr = gencreds()[0]
+    to_addr, password = gencreds()
+
+    msg = maildata("plain.eml", from_addr=from_addr, to_addr=to_addr)
+
+    class env:
+        mail_from = from_addr
+        rcpt_tos = [to_addr]
+        content = msg.as_bytes()
+
+    user = inhandler.config.get_user(to_addr)
+    user.set_password(password)
+    res = inhandler.check_DATA(envelope=env)
+    assert "523 Encryption Needed" in res
+
+    user.allow_incoming_cleartext()
+    assert not inhandler.check_DATA(envelope=env)
+
+
+def test_cleartext_incoming_mailer_daemon(maildata, gencreds, inhandler):
+    from_addr = "mailer-daemon@example.org"
+    to_addr = gencreds()[0]
+
+    msg = maildata("mailer-daemon.eml", from_addr=from_addr, to_addr=to_addr)
+
+    class env:
+        mail_from = from_addr
+        rcpt_tos = [to_addr]
+        content = msg.as_bytes()
+
+    assert not inhandler.check_DATA(envelope=env)
+
+
+def test_cleartext_passthrough_domains(maildata, gencreds, handler):
     from_addr = gencreds()[0]
     to_addr = "privacy@x.y.z"
     handler.config.passthrough_recipients = ["@x.y.z"]
@@ -142,10 +221,10 @@ def test_passthrough_domains(maildata, gencreds, handler):
         rcpt_tos = [to_addr, false_to]
         content = msg.as_bytes()
 
-    assert "500" in handler.check_DATA(envelope=env2)
+    assert "523" in handler.check_DATA(envelope=env2)
 
 
-def test_passthrough_senders(gencreds, handler, maildata):
+def test_cleartext_passthrough_senders(gencreds, handler, maildata):
     acc1 = gencreds()[0]
     to_addr = "recipient@something.org"
     handler.config.passthrough_senders = [acc1]
@@ -162,8 +241,9 @@ def test_passthrough_senders(gencreds, handler, maildata):
 
 
 def test_check_armored_payload():
-    payload = """-----BEGIN PGP MESSAGE-----\r
+    prefix = "-----BEGIN PGP MESSAGE-----\r\n"
-\r
+    comment = "Version: ProtonMail\r\n"
+    payload = """\r
 wU4DSqFx0d1yqAoSAQdAYkX/ZN/Az4B0k7X47zKyWrXxlDEdS3WOy0Yf2+GJTFgg\r
 Zk5ql0mLG8Ze+ZifCS0XMO4otlemSyJ0K1ZPdFMGzUDBTgNqzkFabxXoXRIBB0AM\r
 755wlX41X6Ay3KhnwBq7yEqSykVH6F3x11iHPKraLCAGZoaS8bKKNy/zg5slda1X\r
@@ -196,9 +276,28 @@ UN4fiB0KR9JyG2ayUdNJVkXZSZLnHyRgiaadlpUo16LVvw==\r
 =b5Kp\r
 -----END PGP MESSAGE-----\r
 \r
+\r
 """
 
-    assert check_armored_payload(payload) == True
+    commented_payload = prefix + comment + payload
+    assert check_armored_payload(commented_payload, outgoing=False) == True
+    assert check_armored_payload(commented_payload, outgoing=True) == False
+
+    payload = prefix + payload
+    assert check_armored_payload(payload, outgoing=False) == True
+    assert check_armored_payload(payload, outgoing=True) == True
+
+    payload = payload.removesuffix("\r\n")
+    assert check_armored_payload(payload, outgoing=False) == True
+    assert check_armored_payload(payload, outgoing=True) == True
+
+    payload = payload.removesuffix("\r\n")
+    assert check_armored_payload(payload, outgoing=False) == True
+    assert check_armored_payload(payload, outgoing=True) == True
+
+    payload = payload.removesuffix("\r\n")
+    assert check_armored_payload(payload, outgoing=False) == True
+    assert check_armored_payload(payload, outgoing=True) == True
 
     payload = """-----BEGIN PGP MESSAGE-----\r
 \r
@@ -206,7 +305,8 @@ HELLOWORLD
 -----END PGP MESSAGE-----\r
 \r
 """
-    assert check_armored_payload(payload) == False
+    assert check_armored_payload(payload, outgoing=False) == False
+    assert check_armored_payload(payload, outgoing=True) == False
 
     payload = """-----BEGIN PGP MESSAGE-----\r
 \r
@@ -214,4 +314,48 @@ HELLOWORLD
 -----END PGP MESSAGE-----\r
 \r
 """
-    assert check_armored_payload(payload) == False
+    assert check_armored_payload(payload, outgoing=False) == False
+    assert check_armored_payload(payload, outgoing=True) == False
+
+    # Test payload using partial body length
+    # as generated by GopenPGP.
+    payload = """-----BEGIN PGP MESSAGE-----\r
+\r
+wV4DdCVjRfOT3TQSAQdAY5+pjT6mlCxPGdR3be4w7oJJRUGIPI/Vnh+mJxGSm34w\r
+LNlVc89S1g22uQYFif2sUJsQWbpoHpNkuWpkSgOaHmNvrZiY/YU5iv+cZ3LbmtUG\r
+0uoBisSHh9O1c+5sYZSbrvYZ1NOwlD7Fv/U5/Mw4E5+CjxfdgNGp5o3DDddzPK78\r
+jseDhdSXxnaiIJC93hxNX6R1RPt3G2gukyzx69wciPQShcF8zf3W3o75Ed7B8etV\r
+QEeB16xzdFhKa9JxdjTu3osgCs21IO7wpcFkjc7nZzlW6jPnELJJaNmv4yOOCjMp\r
+6YAkaN/BkL+jHTznHDuDsT5ilnTXpwHDU1Cm9PIx/KFcNCQnIB+2DcdIHPHUH1ci\r
+jvqoeXAVWjKXEjS7PqPFuP/xGbrWG2ugs+toXJOKbgRkExvKs1dwPFKrgghvCVbW\r
+AcKejQKAPArLwpkA7aD875TZQShvGt74fNs45XBlGOYOnNOAJ1KAmzrXLIDViyyB\r
+kDsmTBk785xofuCkjBpXSe6vsMprPzCteDfaUibh8FHeJjucxPerwuOPEmnogNaf\r
+YyL4+iy8H8I9/p7pmUqILprxTG0jTOtlk0bTVzeiF56W1xbtSEMuOo4oFbQTyOM2\r
+bKXaYo774Jm+rRtKAnnI2dtf9RpK19cog6YNzfYjesLKbXDsPZbN5rmwyFiCvvxC\r
+kQ6JLob+B2fPdY2gzy7LypxktS8Zi1HJcWDHJGVmQodaDLqKUObb4M26bXDe6oxI\r
+NS8PJz5exVbM3KhZnUOEn6PJRBBf5a/ZqxlhZPcQo/oBuhKpBRpO5kSDwPIUByu3\r
+UlXLSkpMqe9pUarAOEuQjfl2RVY7U+RrQYp4YP5keMO+i8NCefAFbowTTufO1JIq\r
+2nVgCi/QVnxZyEc9OYt/8AE3g4cdojE+vsSDifZLSWYIetpfrohHv3dT3StD1QRG\r
+0QE6qq6oKpg/IL0cjvuX4c7a7bslv2fXp8t75y37RU6253qdIebhxc/cRhPbc/yu\r
+p0YLyD4SrvKTLP2ZV95jT4IPEpqm4AN3QmiOzdtqR2gLyb62L8QfqI/FdwsIiRiM\r
+hqydwoqt/lfSqG1WKPh+6EkMkH+TDiCC1BQdbN1MNcyUtcjb35PR2c8Ld2TF3guA\r
+jLIqMt/Vb7hBoMb2FcsOYY25ka9oV62OwgKWLXnFzk+modMR5fzb4kxVVAYEqP+D\r
+T5KO1Vs76v1fyPGOq6BbBCvLwTqe/e6IZInJles4v5jrhnLcGKmNGivCUDe6X6NY\r
+UKNt5RsZllwDQpaAb5dMNhyrk8SgIE7TBI7rvqIdUCE52Vy+0JDxFg5olRpFUfO6\r
+/MyTW3Yo/ekk/npHr7iYYqJTCc21bDGLWQcIo/XO7WPxrKNWGBNPFnkRdw0MaKr4\r
++cEM3V8NFnSEpC12xA+RX/CezuJtwXZK5MpG76eYqMO6qyC+c25YcFecEufDZDxx\r
+ZLqRszVRyxyWPtk/oIeQK2v9wOqY6N9/ff01gHz69vqYqN5bUw/QKZsmx1zW+gPw\r
+6x2tDK2BHeYl182gCbhlKISRFwCtbjqZSkiKWao/VtygHkw0fK34avJuyQ/X9YaN\r
+BRy+7Lf3VA53pnB5WJ1xwRXN8VDvmZeXzv2krHveCMemj0OjnRoCLu117xN0A5m9\r
+Fm/RoDix5PolDHtWTtr2m1n2hp2LHnj8at9lFEd0SKhAYHVL9KjzycwWODZRXt+x\r
+zGDDuooEeTvdY5NLyKcl4gETz1ZP4Ez5jGGjhPSwSpq1mU7UaJ9ZXXdr4KHyifW6\r
+ggNzNsGhXTap7IWZpTtqXABydfiBshmH2NjqtNDwBweJVSgP10+r0WhMWlaZs6xl\r
+V3o5yskJt6GlkwpJxZrTvN6Tiww/eW7HFV6NGf7IRSWY5tJc/iA7/92tOmkdvJ1q\r
+myLbG7cJB787QjplEyVe2P/JBO6xYvbkJLf9Q+HaviTO25rugRSrYsoKMDfO8VlQ\r
+1CcnTPVtApPZJEQzAWJEgVAM8uIlkqWJJMgyWT34sTkdBeCUFGloXQFs9Yxd0AGf\r
+/zHEkYZSTKpVSvAIGu4=\r
+=6iHb\r
+-----END PGP MESSAGE-----\r
+"""
+    assert check_armored_payload(payload, outgoing=False) == True
+    assert check_armored_payload(payload, outgoing=True) == True

chatmaild/src/chatmaild/tests/test_filtermail_blackbox.py

@@ -0,0 +1,78 @@
+import smtplib
+import subprocess
+import sys
+
+import pytest
+
+
+@pytest.fixture
+def smtpserver():
+    from pytest_localserver import smtp
+
+    server = smtp.Server("127.0.0.1")
+    server.start()
+    yield server
+    server.stop()
+
+
+@pytest.fixture
+def make_popen(request):
+    def popen(cmdargs, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kw):
+        p = subprocess.Popen(
+            cmdargs,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
+
+        def fin():
+            p.terminate()
+            out, err = p.communicate()
+            print(out.decode("ascii"))
+            print(err.decode("ascii"), file=sys.stderr)
+
+        request.addfinalizer(fin)
+        return p
+
+    return popen
+
+
+@pytest.mark.parametrize("filtermail_mode", ["outgoing", "incoming"])
+def test_one_mail(
+    make_config, make_popen, smtpserver, maildata, filtermail_mode, monkeypatch
+):
+    monkeypatch.setenv("PYTHONUNBUFFERED", "1")
+    smtp_inject_port = 20025
+    if filtermail_mode == "outgoing":
+        settings = dict(
+            postfix_reinject_port=smtpserver.port,
+            filtermail_smtp_port=smtp_inject_port,
+        )
+    else:
+        settings = dict(
+            postfix_reinject_port_incoming=smtpserver.port,
+            filtermail_smtp_port_incoming=smtp_inject_port,
+        )
+
+    config = make_config("example.org", settings=settings)
+    path = str(config._inipath)
+
+    popen = make_popen(["filtermail", path, filtermail_mode])
+    line = popen.stderr.readline().strip()
+    if b"loop" not in line:
+        print(line.decode("ascii"), file=sys.stderr)
+        pytest.fail("starting filtermail failed")
+
+    addr = f"user1@{config.mail_domain}"
+    config.get_user(addr).set_password("l1k2j3l1k2j3l")
+
+    # send encrypted mail
+    data = str(maildata("encrypted.eml", from_addr=addr, to_addr=addr))
+    client = smtplib.SMTP("localhost", smtp_inject_port)
+    client.sendmail(addr, [addr], data)
+    assert len(smtpserver.outbox) == 1
+
+    # send un-encrypted mail that errors
+    data = str(maildata("fake-encrypted.eml", from_addr=addr, to_addr=addr))
+    with pytest.raises(smtplib.SMTPDataError) as e:
+        client.sendmail(addr, [addr], data)
+    assert e.value.smtp_code == 523

chatmaild/src/chatmaild/tests/test_metadata.py

@@ -242,6 +242,22 @@ def test_requeue_removes_tmp_files(notifier, metadata, testaddr, caplog):
     assert queue_item.addr == testaddr
 
 
+def test_requeue_removes_invalid_files(notifier, metadata, testaddr, caplog):
+    metadata.add_token_to_addr(testaddr, "01234")
+    notifier.new_message_for_addr(testaddr, metadata)
+    # empty/invalid files should be ignored
+    p = notifier.queue_dir.joinpath("1203981203")
+    p.touch()
+    notifier2 = notifier.__class__(notifier.queue_dir)
+    notifier2.requeue_persistent_queue_items()
+    assert "spurious" in caplog.records[0].msg
+    assert not p.exists()
+    assert notifier2.retry_queues[0].qsize() == 1
+    when, queue_item = notifier2.retry_queues[0].get()
+    assert when <= int(time.time())
+    assert queue_item.addr == testaddr
+
+
 def test_start_and_stop_notification_threads(notifier, testaddr):
     threads = notifier.start_notification_threads(None)
     for retry_num, threadlist in threads.items():

chatmaild/src/chatmaild/tests/test_metrics.py

@@ -2,8 +2,15 @@ from chatmaild.metrics import main
 
 
 def test_main(tmp_path, capsys):
+    paths = []
     for x in ("ci-asllkj", "ac_12l3kj", "qweqwe", "ci-l1k2j31l2k3"):
-        tmp_path.joinpath(x).mkdir()
+        p = tmp_path.joinpath(x)
+        p.mkdir()
+        p.joinpath("cur").mkdir()
+        paths.append(p)
+
+    tmp_path.joinpath("nomailbox").mkdir()
+
     main(tmp_path)
     out, _ = capsys.readouterr()
     d = {}

chatmaild/src/chatmaild/tests/test_user.py

@@ -40,3 +40,17 @@ def test_no_mailboxes_dir(testaddr, example_config, tmp_path):
     user.set_password("someeqkjwelkqwjleqwe")
     user.set_last_login_timestamp(100000)
     assert user.get_last_login_timestamp() == 86400
+
+
+def test_set_get_cleartext_flag(testaddr, example_config, tmp_path):
+    p = tmp_path.joinpath("a", "mailboxes")
+    example_config.mailboxes_dir = p
+
+    user = example_config.get_user(testaddr)
+    user.set_password("someeqkjwelkqwjleqwe")
+    user.set_last_login_timestamp(100000)
+    assert user.get_last_login_timestamp() == 86400
+
+    assert not user.is_incoming_cleartext_ok()
+    user.allow_incoming_cleartext()
+    assert user.is_incoming_cleartext_ok()

chatmaild/src/chatmaild/turnserver.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+import socket
+
+
+def turn_credentials() -> str:
+    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as client_socket:
+        client_socket.connect("/run/chatmail-turn/turn.socket")
+        with client_socket.makefile("rb") as file:
+            return file.readline().decode("utf-8").strip()

chatmaild/src/chatmaild/user.py

@@ -13,6 +13,7 @@ class User:
         self.maildir = maildir
         self.addr = addr
         self.password_path = password_path
+        self.enforce_E2EE_path = maildir.joinpath("enforceE2EEincoming")
         self.uid = uid
         self.gid = gid
 
@@ -35,6 +36,13 @@ class User:
         home = str(self.maildir)
         return dict(addr=self.addr, home=home, uid=self.uid, gid=self.gid, password=pw)
 
+    def is_incoming_cleartext_ok(self):
+        return not self.enforce_E2EE_path.exists()
+
+    def allow_incoming_cleartext(self):
+        if self.enforce_E2EE_path.exists():
+            self.enforce_E2EE_path.unlink()
+
     def set_password(self, enc_password):
         """Set the specified password for this user.
 
@@ -50,6 +58,8 @@ class User:
             if not self.addr.startswith("echo@"):
                 logging.error(f"could not write password for: {self.addr}")
                 raise
+        if not self.addr.startswith("echo@"):
+            self.enforce_E2EE_path.touch()
 
     def set_last_login_timestamp(self, timestamp):
         """Track login time with daily granularity

cmdeploy/pyproject.toml

@@ -41,3 +41,6 @@ lint.select = [
   "PLE", # Pylint Error
   "PLW", # Pylint Warning
 ]
+lint.ignore = [
+  "PLC0415" # import-outside-top-level
+]

cmdeploy/src/cmdeploy/__init__.py

@@ -1,739 +0,0 @@
-"""
-Chat Mail pyinfra deploy.
-"""
-
-import importlib.resources
-import io
-import shutil
-import subprocess
-import sys
-from pathlib import Path
-
-from chatmaild.config import Config, read_config
-from pyinfra import host, facts
-from pyinfra.facts.files import File
-from pyinfra.facts.systemd import SystemdEnabled
-from pyinfra.operations import apt, files, pip, server, systemd
-
-from .acmetool import deploy_acmetool
-
-
-def _build_chatmaild(dist_dir) -> None:
-    dist_dir = Path(dist_dir).resolve()
-    if dist_dir.exists():
-        shutil.rmtree(dist_dir)
-    dist_dir.mkdir()
-    subprocess.check_output(
-        [sys.executable, "-m", "build", "-n"]
-        + ["--sdist", "chatmaild", "--outdir", str(dist_dir)]
-    )
-    entries = list(dist_dir.iterdir())
-    assert len(entries) == 1
-    return entries[0]
-
-
-def remove_legacy_artifacts():
-    # disable legacy doveauth-dictproxy.service
-    if host.get_fact(SystemdEnabled).get("doveauth-dictproxy.service"):
-        systemd.service(
-            name="Disable legacy doveauth-dictproxy.service",
-            service="doveauth-dictproxy.service",
-            running=False,
-            enabled=False,
-        )
-
-
-def _install_remote_venv_with_chatmaild(config) -> None:
-    remove_legacy_artifacts()
-    dist_file = _build_chatmaild(dist_dir=Path("chatmaild/dist"))
-    remote_base_dir = "/usr/local/lib/chatmaild"
-    remote_dist_file = f"{remote_base_dir}/dist/{dist_file.name}"
-    remote_venv_dir = f"{remote_base_dir}/venv"
-    remote_chatmail_inipath = f"{remote_base_dir}/chatmail.ini"
-    root_owned = dict(user="root", group="root", mode="644")
-
-    apt.packages(
-        name="apt install python3-virtualenv",
-        packages=["python3-virtualenv"],
-    )
-
-    files.put(
-        name="Upload chatmaild source package",
-        src=dist_file.open("rb"),
-        dest=remote_dist_file,
-        create_remote_dir=True,
-        **root_owned,
-    )
-
-    files.put(
-        name=f"Upload {remote_chatmail_inipath}",
-        src=config._getbytefile(),
-        dest=remote_chatmail_inipath,
-        **root_owned,
-    )
-
-    pip.virtualenv(
-        name=f"chatmaild virtualenv {remote_venv_dir}",
-        path=remote_venv_dir,
-        always_copy=True,
-    )
-
-    server.shell(
-        name=f"forced pip-install {dist_file.name}",
-        commands=[
-            f"{remote_venv_dir}/bin/pip install --force-reinstall {remote_dist_file}"
-        ],
-    )
-
-    files.template(
-        src=importlib.resources.files(__package__).joinpath("metrics.cron.j2"),
-        dest="/etc/cron.d/chatmail-metrics",
-        user="root",
-        group="root",
-        mode="644",
-        config={
-            "mailboxes_dir": config.mailboxes_dir,
-            "execpath": f"{remote_venv_dir}/bin/chatmail-metrics",
-        },
-    )
-
-    # install systemd units
-    for fn in (
-        "doveauth",
-        "filtermail",
-        "echobot",
-        "chatmail-metadata",
-        "lastlogin",
-    ):
-        params = dict(
-            execpath=f"{remote_venv_dir}/bin/{fn}",
-            config_path=remote_chatmail_inipath,
-            remote_venv_dir=remote_venv_dir,
-            mail_domain=config.mail_domain,
-        )
-        source_path = importlib.resources.files(__package__).joinpath(
-            "service", f"{fn}.service.f"
-        )
-        content = source_path.read_text().format(**params).encode()
-
-        files.put(
-            name=f"Upload {fn}.service",
-            src=io.BytesIO(content),
-            dest=f"/etc/systemd/system/{fn}.service",
-            **root_owned,
-        )
-        systemd.service(
-            name=f"Setup {fn} service",
-            service=f"{fn}.service",
-            running=True,
-            enabled=True,
-            restarted=True,
-            daemon_reload=True,
-        )
-
-
-def _configure_opendkim(domain: str, dkim_selector: str = "dkim") -> bool:
-    """Configures OpenDKIM"""
-    need_restart = False
-
-    main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/opendkim.conf"),
-        dest="/etc/opendkim.conf",
-        user="root",
-        group="root",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= main_config.changed
-
-    screen_script = files.put(
-        src=importlib.resources.files(__package__).joinpath("opendkim/screen.lua"),
-        dest="/etc/opendkim/screen.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= screen_script.changed
-
-    final_script = files.put(
-        src=importlib.resources.files(__package__).joinpath("opendkim/final.lua"),
-        dest="/etc/opendkim/final.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= final_script.changed
-
-    files.directory(
-        name="Add opendkim directory to /etc",
-        path="/etc/opendkim",
-        user="opendkim",
-        group="opendkim",
-        mode="750",
-        present=True,
-    )
-
-    keytable = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/KeyTable"),
-        dest="/etc/dkimkeys/KeyTable",
-        user="opendkim",
-        group="opendkim",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= keytable.changed
-
-    signing_table = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/SigningTable"),
-        dest="/etc/dkimkeys/SigningTable",
-        user="opendkim",
-        group="opendkim",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= signing_table.changed
-    files.directory(
-        name="Add opendkim socket directory to /var/spool/postfix",
-        path="/var/spool/postfix/opendkim",
-        user="opendkim",
-        group="opendkim",
-        mode="750",
-        present=True,
-    )
-
-    apt.packages(
-        name="apt install opendkim opendkim-tools",
-        packages=["opendkim", "opendkim-tools"],
-    )
-
-    if not host.get_fact(File, f"/etc/dkimkeys/{dkim_selector}.private"):
-        server.shell(
-            name="Generate OpenDKIM domain keys",
-            commands=[
-                f"opendkim-genkey -D /etc/dkimkeys -d {domain} -s {dkim_selector}"
-            ],
-            _sudo=True,
-            _sudo_user="opendkim",
-        )
-
-    return need_restart
-
-
-def _install_mta_sts_daemon() -> bool:
-    need_restart = False
-
-    config = files.put(
-        name="upload postfix-mta-sts-resolver config",
-        src=importlib.resources.files(__package__).joinpath(
-            "postfix/mta-sts-daemon.yml"
-        ),
-        dest="/etc/mta-sts-daemon.yml",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= config.changed
-
-    server.shell(
-        name="install postfix-mta-sts-resolver with pip",
-        commands=[
-            "python3 -m virtualenv /usr/local/lib/postfix-mta-sts-resolver",
-            "/usr/local/lib/postfix-mta-sts-resolver/bin/pip install postfix-mta-sts-resolver",
-        ],
-    )
-
-    systemd_unit = files.put(
-        name="upload mta-sts-daemon systemd unit",
-        src=importlib.resources.files(__package__).joinpath(
-            "postfix/mta-sts-daemon.service"
-        ),
-        dest="/etc/systemd/system/mta-sts-daemon.service",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= systemd_unit.changed
-
-    return need_restart
-
-
-def _configure_postfix(config: Config, debug: bool = False) -> bool:
-    """Configures Postfix SMTP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("postfix/main.cf.j2"),
-        dest="/etc/postfix/main.cf",
-        user="root",
-        group="root",
-        mode="644",
-        config=config,
-        disable_ipv6=config.disable_ipv6,
-    )
-    need_restart |= main_config.changed
-
-    master_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("postfix/master.cf.j2"),
-        dest="/etc/postfix/master.cf",
-        user="root",
-        group="root",
-        mode="644",
-        debug=debug,
-        config=config,
-    )
-    need_restart |= master_config.changed
-
-    header_cleanup = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "postfix/submission_header_cleanup"
-        ),
-        dest="/etc/postfix/submission_header_cleanup",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= header_cleanup.changed
-
-    # Login map that 1:1 maps email address to login.
-    login_map = files.put(
-        src=importlib.resources.files(__package__).joinpath("postfix/login_map"),
-        dest="/etc/postfix/login_map",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= login_map.changed
-
-    return need_restart
-
-
-def _configure_dovecot(config: Config, debug: bool = False) -> bool:
-    """Configures Dovecot IMAP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("dovecot/dovecot.conf.j2"),
-        dest="/etc/dovecot/dovecot.conf",
-        user="root",
-        group="root",
-        mode="644",
-        config=config,
-        debug=debug,
-        disable_ipv6=config.disable_ipv6,
-    )
-    need_restart |= main_config.changed
-    auth_config = files.put(
-        src=importlib.resources.files(__package__).joinpath("dovecot/auth.conf"),
-        dest="/etc/dovecot/auth.conf",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= auth_config.changed
-    lua_push_notification_script = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "dovecot/push_notification.lua"
-        ),
-        dest="/etc/dovecot/push_notification.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= lua_push_notification_script.changed
-
-    files.template(
-        src=importlib.resources.files(__package__).joinpath("dovecot/expunge.cron.j2"),
-        dest="/etc/cron.d/expunge",
-        user="root",
-        group="root",
-        mode="644",
-        config=config,
-    )
-
-    # as per https://doc.dovecot.org/configuration_manual/os/
-    # it is recommended to set the following inotify limits
-    for name in ("max_user_instances", "max_user_watches"):
-        key = f"fs.inotify.{name}"
-        server.sysctl(
-            name=f"Change {key}",
-            key=key,
-            value=65535,
-            persist=True,
-        )
-
-    return need_restart
-
-
-def _configure_nginx(config: Config, debug: bool = False) -> bool:
-    """Configures nginx HTTP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("nginx/nginx.conf.j2"),
-        dest="/etc/nginx/nginx.conf",
-        user="root",
-        group="root",
-        mode="644",
-        config={"domain_name": config.mail_domain},
-        disable_ipv6=config.disable_ipv6,
-    )
-    need_restart |= main_config.changed
-
-    autoconfig = files.template(
-        src=importlib.resources.files(__package__).joinpath("nginx/autoconfig.xml.j2"),
-        dest="/var/www/html/.well-known/autoconfig/mail/config-v1.1.xml",
-        user="root",
-        group="root",
-        mode="644",
-        config={"domain_name": config.mail_domain},
-    )
-    need_restart |= autoconfig.changed
-
-    mta_sts_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("nginx/mta-sts.txt.j2"),
-        dest="/var/www/html/.well-known/mta-sts.txt",
-        user="root",
-        group="root",
-        mode="644",
-        config={"domain_name": config.mail_domain},
-    )
-    need_restart |= mta_sts_config.changed
-
-    # install CGI newemail script
-    #
-    cgi_dir = "/usr/lib/cgi-bin"
-    files.directory(
-        name=f"Ensure {cgi_dir} exists",
-        path=cgi_dir,
-        user="root",
-        group="root",
-    )
-
-    files.put(
-        name="Upload cgi newemail.py script",
-        src=importlib.resources.files("chatmaild").joinpath("newemail.py").open("rb"),
-        dest=f"{cgi_dir}/newemail.py",
-        user="root",
-        group="root",
-        mode="755",
-    )
-
-    return need_restart
-
-
-def _remove_rspamd() -> None:
-    """Remove rspamd"""
-    apt.packages(name="Remove rspamd", packages="rspamd", present=False)
-
-
-def check_config(config):
-    mail_domain = config.mail_domain
-    if mail_domain != "testrun.org" and not mail_domain.endswith(".testrun.org"):
-        blocked_words = "merlinux schmieder testrun.org".split()
-        for key in config.__dict__:
-            value = config.__dict__[key]
-            if key.startswith("privacy") and any(
-                x in str(value) for x in blocked_words
-            ):
-                raise ValueError(
-                    f"please set your own privacy contacts/addresses in {config._inipath}"
-                )
-    return config
-
-
-def deploy_mtail(config):
-    apt.packages(
-        name="Install mtail",
-        packages=["mtail"],
-    )
-
-    # Using our own systemd unit instead of `/usr/lib/systemd/system/mtail.service`.
-    # This allows to read from journalctl instead of log files.
-    files.template(
-        src=importlib.resources.files(__package__).joinpath("mtail/mtail.service.j2"),
-        dest="/etc/systemd/system/mtail.service",
-        user="root",
-        group="root",
-        mode="644",
-        address=config.mtail_address or "127.0.0.1",
-        port=3903,
-    )
-
-    mtail_conf = files.put(
-        name="Mtail configuration",
-        src=importlib.resources.files(__package__).joinpath(
-            "mtail/delivered_mail.mtail"
-        ),
-        dest="/etc/mtail/delivered_mail.mtail",
-        user="root",
-        group="root",
-        mode="644",
-    )
-
-    systemd.service(
-        name="Start and enable mtail",
-        service="mtail.service",
-        running=bool(config.mtail_address),
-        enabled=bool(config.mtail_address),
-        restarted=mtail_conf.changed,
-    )
-
-
-def deploy_iroh_relay(config) -> None:
-    (url, sha256sum) = {
-        "x86_64": (
-            "https://github.com/n0-computer/iroh/releases/download/v0.28.1/iroh-relay-v0.28.1-x86_64-unknown-linux-musl.tar.gz",
-            "2ffacf7c0622c26b67a5895ee8e07388769599f60e5f52a3bd40a3258db89b2c",
-        ),
-        "aarch64": (
-            "https://github.com/n0-computer/iroh/releases/download/v0.28.1/iroh-relay-v0.28.1-aarch64-unknown-linux-musl.tar.gz",
-            "b915037bcc1ff1110cc9fcb5de4a17c00ff576fd2f568cd339b3b2d54c420dc4",
-        ),
-    }[host.get_fact(facts.server.Arch)]
-
-    apt.packages(
-        name="Install curl",
-        packages=["curl"],
-    )
-
-    server.shell(
-        name="Download iroh-relay",
-        commands=[
-            f"(echo '{sha256sum} /usr/local/bin/iroh-relay' | sha256sum -c) || (curl -L {url} | gunzip | tar -x -f - ./iroh-relay -O >/usr/local/bin/iroh-relay.new && mv /usr/local/bin/iroh-relay.new /usr/local/bin/iroh-relay)",
-            "chmod 755 /usr/local/bin/iroh-relay",
-        ],
-    )
-
-    need_restart = False
-
-    systemd_unit = files.put(
-        name="Upload iroh-relay systemd unit",
-        src=importlib.resources.files(__package__).joinpath("iroh-relay.service"),
-        dest="/etc/systemd/system/iroh-relay.service",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= systemd_unit.changed
-
-    iroh_config = files.put(
-        name=f"Upload iroh-relay config",
-        src=importlib.resources.files(__package__).joinpath("iroh-relay.toml"),
-        dest=f"/etc/iroh-relay.toml",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= iroh_config.changed
-
-    systemd.service(
-        name="Start and enable iroh-relay",
-        service="iroh-relay.service",
-        running=True,
-        enabled=config.enable_iroh_relay,
-        restarted=need_restart,
-    )
-
-
-def deploy_chatmail(config_path: Path, disable_mail: bool) -> None:
-    """Deploy a chat-mail instance.
-
-    :param config_path: path to chatmail.ini
-    :param disable_mail: whether to disable postfix & dovecot
-    """
-    config = read_config(config_path)
-    check_config(config)
-    mail_domain = config.mail_domain
-
-    from .www import build_webpages
-
-    server.group(name="Create vmail group", group="vmail", system=True)
-    server.user(name="Create vmail user", user="vmail", group="vmail", system=True)
-    server.user(name="Create filtermail user", user="filtermail", system=True)
-    server.group(name="Create opendkim group", group="opendkim", system=True)
-    server.user(
-        name="Create opendkim user",
-        user="opendkim",
-        groups=["opendkim"],
-        system=True,
-    )
-    server.user(
-        name="Add postfix user to opendkim group for socket access",
-        user="postfix",
-        groups=["opendkim"],
-        system=True,
-    )
-    server.user(name="Create echobot user", user="echobot", system=True)
-    server.user(name="Create iroh user", user="iroh", system=True)
-
-    # Add our OBS repository for dovecot_no_delay
-    files.put(
-        name="Add Deltachat OBS GPG key to apt keyring",
-        src=importlib.resources.files(__package__).joinpath("obs-home-deltachat.gpg"),
-        dest="/etc/apt/keyrings/obs-home-deltachat.gpg",
-        user="root",
-        group="root",
-        mode="644",
-    )
-
-    files.line(
-        name="Add DeltaChat OBS home repository to sources.list",
-        path="/etc/apt/sources.list",
-        line="deb [signed-by=/etc/apt/keyrings/obs-home-deltachat.gpg] https://download.opensuse.org/repositories/home:/deltachat/Debian_12/ ./",
-        escape_regex_characters=True,
-        ensure_newline=True,
-    )
-
-    apt.update(name="apt update", cache_time=24 * 3600)
-    apt.upgrade(name="upgrade apt packages", auto_remove=True)
-
-    apt.packages(
-        name="Install rsync",
-        packages=["rsync"],
-    )
-
-    # Run local DNS resolver `unbound`.
-    # `resolvconf` takes care of setting up /etc/resolv.conf
-    # to use 127.0.0.1 as the resolver.
-    apt.packages(
-        name="Install unbound",
-        packages=["unbound", "unbound-anchor", "dnsutils"],
-    )
-    server.shell(
-        name="Generate root keys for validating DNSSEC",
-        commands=[
-            "unbound-anchor -a /var/lib/unbound/root.key || true",
-            "systemctl reset-failed unbound.service",
-        ],
-    )
-    systemd.service(
-        name="Start and enable unbound",
-        service="unbound.service",
-        running=True,
-        enabled=True,
-    )
-
-    deploy_iroh_relay(config)
-
-    # Deploy acmetool to have TLS certificates.
-    tls_domains = [mail_domain, f"mta-sts.{mail_domain}", f"www.{mail_domain}"]
-    deploy_acmetool(
-        domains=tls_domains,
-    )
-
-    apt.packages(
-        # required for setfacl for echobot
-        name="Install acl",
-        packages="acl",
-    )
-
-    apt.packages(
-        name="Install Postfix",
-        packages="postfix",
-    )
-
-    apt.packages(
-        name="Install Dovecot",
-        packages=["dovecot-imapd", "dovecot-lmtpd"],
-    )
-
-    apt.packages(
-        name="Install nginx",
-        packages=["nginx", "libnginx-mod-stream"],
-    )
-
-    apt.packages(
-        name="Install fcgiwrap",
-        packages=["fcgiwrap"],
-    )
-
-    www_path = importlib.resources.files(__package__).joinpath("../../../www").resolve()
-
-    build_dir = www_path.joinpath("build")
-    src_dir = www_path.joinpath("src")
-    build_webpages(src_dir, build_dir, config)
-    files.rsync(f"{build_dir}/", "/var/www/html", flags=["-avz"])
-
-    _install_remote_venv_with_chatmaild(config)
-    debug = False
-    dovecot_need_restart = _configure_dovecot(config, debug=debug)
-    postfix_need_restart = _configure_postfix(config, debug=debug)
-    mta_sts_need_restart = _install_mta_sts_daemon()
-    nginx_need_restart = _configure_nginx(config)
-
-    _remove_rspamd()
-    opendkim_need_restart = _configure_opendkim(mail_domain, "opendkim")
-
-    systemd.service(
-        name="Start and enable OpenDKIM",
-        service="opendkim.service",
-        running=True,
-        enabled=True,
-        restarted=opendkim_need_restart,
-    )
-
-    systemd.service(
-        name="Start and enable MTA-STS daemon",
-        service="mta-sts-daemon.service",
-        daemon_reload=True,
-        running=True,
-        enabled=True,
-        restarted=mta_sts_need_restart,
-    )
-
-    # Dovecot should be started before Postfix
-    # because it creates authentication socket
-    # required by Postfix.
-    systemd.service(
-        name="disable dovecot for now" if disable_mail else "Start and enable Dovecot",
-        service="dovecot.service",
-        running=False if disable_mail else True,
-        enabled=False if disable_mail else True,
-        restarted=dovecot_need_restart if not disable_mail else False,
-    )
-
-    systemd.service(
-        name="disable postfix for now" if disable_mail else "Start and enable Postfix",
-        service="postfix.service",
-        running=False if disable_mail else True,
-        enabled=False if disable_mail else True,
-        restarted=postfix_need_restart if not disable_mail else False,
-    )
-
-    systemd.service(
-        name="Start and enable nginx",
-        service="nginx.service",
-        running=True,
-        enabled=True,
-        restarted=nginx_need_restart,
-    )
-
-    # This file is used by auth proxy.
-    # https://wiki.debian.org/EtcMailName
-    server.shell(
-        name="Setup /etc/mailname",
-        commands=[f"echo {mail_domain} >/etc/mailname; chmod 644 /etc/mailname"],
-    )
-
-    journald_conf = files.put(
-        name="Configure journald",
-        src=importlib.resources.files(__package__).joinpath("journald.conf"),
-        dest="/etc/systemd/journald.conf",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    systemd.service(
-        name="Start and enable journald",
-        service="systemd-journald.service",
-        running=True,
-        enabled=True,
-        restarted=journald_conf.changed,
-    )
-
-    apt.packages(
-        name="Ensure cron is installed",
-        packages=["cron"],
-    )
-
-    deploy_mtail(config)

cmdeploy/src/cmdeploy/acmetool/__init__.py

@@ -1,75 +1,128 @@
 import importlib.resources
 
-from pyinfra import host
-from pyinfra.facts.systemd import SystemdStatus
 from pyinfra.operations import apt, files, server, systemd
 
+from ..basedeploy import Deployer
 
-def deploy_acmetool(email="", domains=[]):
-    """Deploy acmetool."""
-    apt.packages(
-        name="Install acmetool",
-        packages=["acmetool"],
-    )
 
-    files.put(
+class AcmetoolDeployer(Deployer):
-        src=importlib.resources.files(__package__).joinpath("acmetool.cron").open("rb"),
+    def __init__(self, email, domains):
-        dest="/etc/cron.d/acmetool",
+        self.domains = domains
-        user="root",
+        self.email = email
-        group="root",
+        self.need_restart_redirector = False
-        mode="644",
+        self.need_restart_reconcile_service = False
-    )
+        self.need_restart_reconcile_timer = False
 
-    files.put(
+    def install(self):
-        src=importlib.resources.files(__package__).joinpath("acmetool.hook").open("rb"),
+        apt.packages(
-        dest="/usr/lib/acme/hooks/nginx",
+            name="Install acmetool",
-        user="root",
+            packages=["acmetool"],
-        group="root",
-        mode="744",
-    )
-
-    files.template(
-        src=importlib.resources.files(__package__).joinpath("response-file.yaml.j2"),
-        dest="/var/lib/acme/conf/responses",
-        user="root",
-        group="root",
-        mode="644",
-        email=email,
-    )
-
-    files.template(
-        src=importlib.resources.files(__package__).joinpath("target.yaml.j2"),
-        dest="/var/lib/acme/conf/target",
-        user="root",
-        group="root",
-        mode="644",
-    )
-
-    service_file = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "acmetool-redirector.service"
-        ),
-        dest="/etc/systemd/system/acmetool-redirector.service",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    if host.get_fact(SystemdStatus).get("nginx.service"):
-        systemd.service(
-            name="Stop nginx service to free port 80",
-            service="nginx",
-            running=False,
         )
 
-    systemd.service(
+        files.file(
-        name="Setup acmetool-redirector service",
+            name="Remove old acmetool cronjob, it is replaced with systemd timer.",
-        service="acmetool-redirector.service",
+            path="/etc/cron.d/acmetool",
-        running=True,
+            present=False,
-        enabled=True,
+        )
-        restarted=service_file.changed,
-    )
 
-    server.shell(
+        files.put(
-        name=f"Request certificate for: { ', '.join(domains) }",
+            name="Install acmetool hook.",
-        commands=[f"acmetool want --xlog.severity=debug { ' '.join(domains)}"],
+            src=importlib.resources.files(__package__)
-    )
+            .joinpath("acmetool.hook")
+            .open("rb"),
+            dest="/etc/acme/hooks/nginx",
+            user="root",
+            group="root",
+            mode="755",
+        )
+        files.file(
+            name="Remove acmetool hook from the wrong location where it was previously installed.",
+            path="/usr/lib/acme/hooks/nginx",
+            present=False,
+        )
+
+    def configure(self):
+        files.template(
+            src=importlib.resources.files(__package__).joinpath(
+                "response-file.yaml.j2"
+            ),
+            dest="/var/lib/acme/conf/responses",
+            user="root",
+            group="root",
+            mode="644",
+            email=self.email,
+        )
+
+        files.template(
+            src=importlib.resources.files(__package__).joinpath("target.yaml.j2"),
+            dest="/var/lib/acme/conf/target",
+            user="root",
+            group="root",
+            mode="644",
+        )
+
+        service_file = files.put(
+            src=importlib.resources.files(__package__).joinpath(
+                "acmetool-redirector.service"
+            ),
+            dest="/etc/systemd/system/acmetool-redirector.service",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        self.need_restart_redirector = service_file.changed
+
+        reconcile_service_file = files.put(
+            src=importlib.resources.files(__package__).joinpath(
+                "acmetool-reconcile.service"
+            ),
+            dest="/etc/systemd/system/acmetool-reconcile.service",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        self.need_restart_reconcile_service = reconcile_service_file.changed
+
+        reconcile_timer_file = files.put(
+            src=importlib.resources.files(__package__).joinpath(
+                "acmetool-reconcile.timer"
+            ),
+            dest="/etc/systemd/system/acmetool-reconcile.timer",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        self.need_restart_reconcile_timer = reconcile_timer_file.changed
+
+    def activate(self):
+        systemd.service(
+            name="Setup acmetool-redirector service",
+            service="acmetool-redirector.service",
+            running=True,
+            enabled=True,
+            restarted=self.need_restart_redirector,
+        )
+        self.need_restart_redirector = False
+
+        systemd.service(
+            name="Setup acmetool-reconcile service",
+            service="acmetool-reconcile.service",
+            running=False,
+            enabled=False,
+            daemon_reload=self.need_restart_reconcile_service,
+        )
+        self.need_restart_reconcile_service = False
+
+        systemd.service(
+            name="Setup acmetool-reconcile timer",
+            service="acmetool-reconcile.timer",
+            running=True,
+            enabled=True,
+            daemon_reload=self.need_restart_reconcile_timer,
+        )
+        self.need_restart_reconcile_timer = False
+
+        server.shell(
+            name=f"Request certificate for: {', '.join(self.domains)}",
+            commands=[f"acmetool want --xlog.severity=debug {' '.join(self.domains)}"],
+        )

cmdeploy/src/cmdeploy/acmetool/acmetool-reconcile.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=Renew TLS certificates with acmetool
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/acmetool --batch reconcile
+

cmdeploy/src/cmdeploy/acmetool/acmetool-reconcile.timer

@@ -0,0 +1,8 @@
+[Unit]
+Description=Renew TLS certificates with acmetool
+
+[Timer]
+OnCalendar=*-*-* 16:20:00
+
+[Install]
+WantedBy=timers.target

cmdeploy/src/cmdeploy/acmetool/acmetool.cron

@@ -1,4 +0,0 @@
-SHELL=/bin/sh
-PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
-MAILTO=root
-20 16 * * * root /usr/bin/acmetool --batch reconcile && systemctl reload dovecot && systemctl reload postfix && systemctl reload nginx

cmdeploy/src/cmdeploy/acmetool/response-file.yaml.j2

@@ -1,2 +1,2 @@
 "acme-enter-email": "{{ email }}"
-"acme-agreement:https://letsencrypt.org/documents/LE-SA-v1.4-April-3-2024.pdf": true
+"acme-agreement:https://letsencrypt.org/documents/LE-SA-v1.5-February-24-2025.pdf": true

cmdeploy/src/cmdeploy/acmetool/target.yaml.j2

@@ -1,7 +1,8 @@
 request:
   provider: https://acme-v02.api.letsencrypt.org/directory
   key:
-    type: rsa
+    type: ecdsa
+    ecdsa-curve: nistp256
   challenge:
     webroot-paths:
     - /var/www/html/.well-known/acme-challenge

cmdeploy/src/cmdeploy/basedeploy.py

@@ -0,0 +1,57 @@
+import os
+
+from pyinfra.operations import server
+
+
+class Deployment:
+    def install(self, deployer):
+        # optional 'required_users' contains a list of (user, group, secondary-group-list) tuples.
+        # If the group is None, no group is created corresponding to that user.
+        # If the secondary group list is not None, all listed groups are created as well.
+        required_users = getattr(deployer, "required_users", [])
+        for user, group, groups in required_users:
+            if group is not None:
+                server.group(
+                    name="Create {} group".format(group), group=group, system=True
+                )
+            if groups is not None:
+                for group2 in groups:
+                    server.group(
+                        name="Create {} group".format(group2), group=group2, system=True
+                    )
+            server.user(
+                name="Create {} user".format(user),
+                user=user,
+                group=group,
+                groups=groups,
+                system=True,
+            )
+
+        deployer.install()
+
+    def configure(self, deployer):
+        deployer.configure()
+
+    def activate(self, deployer):
+        deployer.activate()
+
+    def perform_stages(self, deployers):
+        default_stages = "install,configure,activate"
+        stages = os.getenv("CMDEPLOY_STAGES", default_stages).split(",")
+
+        for stage in stages:
+            for deployer in deployers:
+                getattr(self, stage)(deployer)
+
+
+class Deployer:
+    need_restart = False
+
+    def install(self):
+        pass
+
+    def configure(self):
+        pass
+
+    def activate(self):
+        pass

cmdeploy/src/cmdeploy/chatmail.zone.j2

@@ -16,7 +16,7 @@ www.{{ mail_domain }}.               CNAME {{ mail_domain }}.
 ;
 ; Recommended DNS entries for interoperability and security-hardening
 ;
-{{ mail_domain }}.                   TXT "v=spf1 a:{{ mail_domain }} ~all"
+{{ mail_domain }}.                   TXT "v=spf1 a ~all"
 _dmarc.{{ mail_domain }}.            TXT "v=DMARC1;p=reject;adkim=s;aspf=s"
 
 {% if acme_account_url %}

cmdeploy/src/cmdeploy/cmdeploy.py

@@ -19,7 +19,7 @@ from packaging import version
 from termcolor import colored
 
 from . import dns, remote
-from .sshexec import SSHExec
+from .sshexec import LocalExec, SSHExec
 
 #
 # cmdeploy sub commands and options
@@ -32,17 +32,30 @@ def init_cmd_options(parser):
         action="store",
         help="fully qualified DNS domain name for your chatmail instance",
     )
+    parser.add_argument(
+        "--force",
+        dest="recreate_ini",
+        action="store_true",
+        help="force reacreate ini file",
+    )
 
 
 def init_cmd(args, out):
     """Initialize chatmail config file."""
     mail_domain = args.chatmail_domain
+    inipath = args.inipath
     if args.inipath.exists():
-        print(f"Path exists, not modifying: {args.inipath}")
+        if not args.recreate_ini:
-        return 1
+            print(f"[WARNING] Path exists, not modifying: {inipath}")
-    else:
+            return 1
-        write_initial_config(args.inipath, mail_domain, overrides={})
+        else:
-        out.green(f"created config file for {mail_domain} in {args.inipath}")
+            print(
+                f"[WARNING] Force argument was provided, deleting config file: {inipath}"
+            )
+            inipath.unlink()
+
+    write_initial_config(inipath, mail_domain, overrides={})
+    out.green(f"created config file for {mail_domain} in {inipath}")
 
 
 def run_cmd_options(parser):
@@ -56,45 +69,65 @@ def run_cmd_options(parser):
         "--disable-mail",
         dest="disable_mail",
         action="store_true",
-        help="install/upgrade the server, but disable postfix & dovecot for now"
+        help="install/upgrade the server, but disable postfix & dovecot for now",
     )
     parser.add_argument(
-        "--ssh-host",
+        "--skip-dns-check",
-        dest="ssh_host",
+        dest="dns_check_disabled",
-        help="specify an SSH host to deploy to; uses mail_domain from chatmail.ini by default"
+        action="store_true",
+        help="disable checks nslookup for dns",
     )
+    add_ssh_host_option(parser)
 
 
 def run_cmd(args, out):
     """Deploy chatmail services on the remote server."""
 
-    sshexec = args.get_sshexec()
+    ssh_host = args.ssh_host if args.ssh_host else args.config.mail_domain
+    sshexec = get_sshexec(ssh_host)
     require_iroh = args.config.enable_iroh_relay
-    remote_data = dns.get_initial_remote_data(sshexec, args.config.mail_domain)
+    if not args.dns_check_disabled:
-    if not dns.check_initial_remote_data(remote_data, print=out.red):
+        remote_data = dns.get_initial_remote_data(sshexec, args.config.mail_domain)
-        return 1
+        if not dns.check_initial_remote_data(remote_data, print=out.red):
+            return 1
 
     env = os.environ.copy()
     env["CHATMAIL_INI"] = args.inipath
     env["CHATMAIL_DISABLE_MAIL"] = "True" if args.disable_mail else ""
     env["CHATMAIL_REQUIRE_IROH"] = "True" if require_iroh else ""
-    deploy_path = importlib.resources.files(__package__).joinpath("deploy.py").resolve()
+    deploy_path = importlib.resources.files(__package__).joinpath("run.py").resolve()
     pyinf = "pyinfra --dry" if args.dry_run else "pyinfra"
-    ssh_host = args.config.mail_domain if not args.ssh_host else args.ssh_host
+
     cmd = f"{pyinf} --ssh-user root {ssh_host} {deploy_path} -y"
+    if ssh_host in ["localhost", "@docker"]:
+        cmd = f"{pyinf} @local {deploy_path} -y"
+
     if version.parse(pyinfra.__version__) < version.parse("3"):
         out.red("Please re-run scripts/initenv.sh to update pyinfra to version 3.")
         return 1
 
-    retcode = out.check_call(cmd, env=env)
+    try:
-    if retcode == 0:
+        retcode = out.check_call(cmd, env=env)
-        out.green("Deploy completed, call `cmdeploy dns` next.")
+        if retcode == 0:
-    elif not remote_data["acme_account_url"]:
+            if not args.disable_mail:
-        out.red("Deploy completed but letsencrypt not configured")
+                print("\nYou can try out the relay by talking to this echo bot: ")
-        out.red("Run 'cmdeploy run' again")
+                sshexec = SSHExec(args.config.mail_domain, verbose=args.verbose)
-        retcode = 0
+                print(
-    else:
+                    sshexec(
+                        call=remote.rshell.shell,
+                        kwargs=dict(command="cat /var/lib/echobot/invite-link.txt"),
+                    )
+                )
+            out.green("Deploy completed, call `cmdeploy dns` next.")
+        elif not remote_data["acme_account_url"]:
+            out.red("Deploy completed but letsencrypt not configured")
+            out.red("Run 'cmdeploy run' again")
+            retcode = 0
+        else:
+            out.red("Deploy failed")
+    except subprocess.CalledProcessError:
         out.red("Deploy failed")
+        retcode = 1
     return retcode
 
 
@@ -106,11 +139,13 @@ def dns_cmd_options(parser):
         default=None,
         help="write out a zonefile",
     )
+    add_ssh_host_option(parser)
 
 
 def dns_cmd(args, out):
     """Check DNS entries and optionally generate dns zone file."""
-    sshexec = args.get_sshexec()
+    ssh_host = args.ssh_host if args.ssh_host else args.config.mail_domain
+    sshexec = get_sshexec(ssh_host, verbose=args.verbose)
     remote_data = dns.get_initial_remote_data(sshexec, args.config.mail_domain)
     if not remote_data:
         return 1
@@ -136,10 +171,15 @@ def dns_cmd(args, out):
     return retcode
 
 
+def status_cmd_options(parser):
+    add_ssh_host_option(parser)
+
+
 def status_cmd(args, out):
     """Display status for online chatmail instance."""
 
-    sshexec = args.get_sshexec()
+    ssh_host = args.ssh_host if args.ssh_host else args.config.mail_domain
+    sshexec = get_sshexec(ssh_host, verbose=args.verbose)
 
     out.green(f"chatmail domain: {args.config.mail_domain}")
     if args.config.privacy_mail:
@@ -198,7 +238,12 @@ def fmt_cmd_options(parser):
 def fmt_cmd(args, out):
     """Run formattting fixes on all chatmail source code."""
 
-    sources = [str(importlib.resources.files(x)) for x in ("chatmaild", "cmdeploy")]
+    chatmaild_dir = importlib.resources.files("chatmaild").resolve()
+    cmdeploy_dir = chatmaild_dir.joinpath(
+        "..", "..", "..", "cmdeploy", "src", "cmdeploy"
+    ).resolve()
+    sources = [str(chatmaild_dir), str(cmdeploy_dir)]
+
     format_args = [shutil.which("ruff"), "format"]
     check_args = [shutil.which("ruff"), "check"]
 
@@ -264,6 +309,15 @@ class Out:
         return proc.returncode
 
 
+def add_ssh_host_option(parser):
+    parser.add_argument(
+        "--ssh-host",
+        dest="ssh_host",
+        help="Run commands on 'localhost', via '@docker', or on a specific SSH host "
+        "instead of chatmail.ini's mail_domain.",
+    )
+
+
 def add_config_option(parser):
     parser.add_argument(
         "--config",
@@ -319,6 +373,16 @@ def get_parser():
     return parser
 
 
+def get_sshexec(ssh_host: str, verbose=True):
+    if ssh_host in ["localhost", "@local"]:
+        return LocalExec(verbose, docker=False)
+    elif ssh_host == "@docker":
+        return LocalExec(verbose, docker=True)
+    if verbose:
+        print(f"[ssh] login to {ssh_host}")
+    return SSHExec(ssh_host, verbose=verbose)
+
+
 def main(args=None):
     """Provide main entry point for 'cmdeploy' CLI invocation."""
     parser = get_parser()
@@ -326,12 +390,6 @@ def main(args=None):
     if not hasattr(args, "func"):
         return parser.parse_args(["-h"])
 
-    def get_sshexec():
-        print(f"[ssh] login to {args.config.mail_domain}")
-        return SSHExec(args.config.mail_domain, verbose=args.verbose)
-
-    args.get_sshexec = get_sshexec
-
     out = Out()
     kwargs = {}
     if args.func.__name__ not in ("init_cmd", "fmt_cmd"):

cmdeploy/src/cmdeploy/dns.py

@@ -46,7 +46,7 @@ def check_full_zone(sshexec, remote_data, out, zonefile) -> int:
 
     required_diff, recommended_diff = sshexec.logged(
         remote.rdns.check_zonefile,
-        kwargs=dict(zonefile=zonefile, mail_domain=remote_data["mail_domain"]),
+        kwargs=dict(zonefile=zonefile, verbose=False),
     )
 
     returncode = 0
@@ -56,6 +56,11 @@ def check_full_zone(sshexec, remote_data, out, zonefile) -> int:
             out(line)
         out("")
         returncode = 1
+    if remote_data.get("dkim_entry") in required_diff:
+        out(
+            "If the DKIM entry above does not work with your DNS provider, you can try this one:\n"
+        )
+        out(remote_data.get("web_dkim_entry") + "\n")
     if recommended_diff:
         out("WARNING: these recommended DNS entries are not set:\n")
         for line in recommended_diff:

cmdeploy/src/cmdeploy/dovecot/dovecot.conf.j2

@@ -70,6 +70,12 @@ userdb {
 # Mailboxes are stored in the "mail" directory of the vmail user home.
 mail_location = maildir:{{ config.mailboxes_dir }}/%u
 
+# index/cache files are not very useful for chatmail relay operations 
+# but it's not clear how to disable them completely. 
+# According to https://doc.dovecot.org/2.3/settings/advanced/#core_setting-mail_cache_max_size
+# if the cache file becomes larger than the specified size, it is truncated by dovecot 
+mail_cache_max_size = 500K
+
 namespace inbox {
   inbox = yes
 
@@ -177,20 +183,34 @@ service auth-worker {
 }
 
 service imap-login {
-    # High-security mode.
+    # High-performance mode as described in
-    # Each process serves a single connection and exits afterwards.
+    # <https://doc.dovecot.org/2.3/admin_manual/login_processes/#high-performance-mode>
-    # This is the default, but we set it explicitly to be sure.
-    # See <https://doc.dovecot.org/admin_manual/login_processes/#high-security-mode> for details.
-    service_count = 1
-
-    # Inrease the number of simultaneous connections.
     #
-    # As of Dovecot 2.3.19.1 the default is 100 processes.
+    # So-called high-security mode described in
-    # Combined with `service_count = 1` it means only 100 connections
+    # <https://doc.dovecot.org/2.3/admin_manual/login_processes/#high-security-mode>
-    # can be handled simultaneously.
+    # and enabled by default with `service_count = 1` starts one process per connection
-    process_limit = 10000
+    # and has problems logging in thousands of users after Dovecot restart.
+    service_count = 0
+
+    # Increase virtual memory size limit.
+    # Since imap-login processes handle TLS connections
+    # even after logging users in
+    # and many connections are handled by each process,
+    # memory size limit should be increased.
+    #
+    # Otherwise the whole process eventually dies
+    # with an error similar to
+    #   imap-login: Fatal: master: service(imap-login):
+    #   child 1422951 returned error 83
+    #   (Out of memory (service imap-login { vsz_limit=256 MB },
+    #    you may need to increase it)
+    # and takes down all its TLS connections at once.
+    vsz_limit = 1G
 
     # Avoid startup latency for new connections.
+    #
+    # Should be set to at least the number of CPU cores
+    # according to the documentation.
     process_min_avail = 10
 }
 
@@ -209,7 +229,7 @@ ssl = required
 ssl_cert = </var/lib/acme/live/{{ config.mail_domain }}/fullchain
 ssl_key = </var/lib/acme/live/{{ config.mail_domain }}/privkey
 ssl_dh = </usr/share/dovecot/dh.pem
-ssl_min_protocol = TLSv1.2
+ssl_min_protocol = TLSv1.3
 ssl_prefer_server_ciphers = yes
 
 

cmdeploy/src/cmdeploy/dovecot/expunge.cron.j2

@@ -1,12 +0,0 @@
-# delete all mails after {{ config.delete_mails_after }} days, in the Inbox
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/cur/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-# or in any IMAP subfolder
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/.*/cur/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-# even if they are unseen
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/new/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/.*/new/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-# or only temporary (but then they shouldn't be around after {{ config.delete_mails_after }} days anyway).
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/tmp/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-2 0 * * * vmail find {{ config.mailboxes_dir }} -path '*/.*/tmp/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-3 0 * * * vmail find {{ config.mailboxes_dir }} -name 'maildirsize' -type f -delete
-4 0 * * * vmail /usr/local/lib/chatmaild/venv/bin/delete_inactive_users /usr/local/lib/chatmaild/chatmail.ini 

cmdeploy/src/cmdeploy/dovecot/push_notification.lua

@@ -2,15 +2,6 @@ function dovecot_lua_notify_begin_txn(user)
   return user
 end
 
-function contains(v, needle)
-  for _, keyword in ipairs(v) do
-    if keyword == needle then
-      return true
-    end
-  end
-  return false
-end
-
 function dovecot_lua_notify_event_message_new(user, event)
   local mbox = user:mailbox(event.mailbox)
   mbox:sync()

cmdeploy/src/cmdeploy/iroh-relay.toml

@@ -1,5 +1,11 @@
 enable_relay = true
 http_bind_addr = "[::]:3340"
-enable_stun = true
+
+# Disable built-in STUN server in iroh-relay 0.35
+# as we deploy our own TURN server instead.
+# STUN server is going to be removed in iroh-relay 1.0
+# and this line can be removed after upgrade.
+enable_stun = false
+
 enable_metrics = false
 metrics_bind_addr = "127.0.0.1:9092"

cmdeploy/src/cmdeploy/mtail/mtail.service.j2

@@ -3,7 +3,7 @@ Description=mtail
 
 [Service]
 Type=simple
-ExecStart=/bin/sh -c "journalctl -f -o short-iso -n 0 | /usr/bin/mtail --address={{ address }} --port={{ port }} --progs /etc/mtail --logtostderr --logs -"
+ExecStart=/bin/sh -c "journalctl -f -o short-iso -n 0 | /usr/local/bin/mtail --address={{ address }} --port={{ port }} --progs /etc/mtail --logtostderr --logs -"
 Restart=on-failure
 
 [Install]

cmdeploy/src/cmdeploy/nginx/nginx.conf.j2

@@ -2,11 +2,25 @@ load_module modules/ngx_stream_module.so;
 
 user www-data;
 worker_processes auto;
+
+# Increase the number of connections
+# that a worker process can open
+# to avoid errors such as
+#   accept4() failed (24: Too many open files)
+# and
+#   socket() failed (24: Too many open files) while connecting to upstream
+# in the logs.
+# <https://nginx.org/en/docs/ngx_core_module.html#worker_rlimit_nofile>
+worker_rlimit_nofile 2048;
 pid /run/nginx.pid;
 error_log syslog:server=unix:/dev/log,facility=local3;
 
 events {
-	worker_connections 768;
+        # Increase to avoid errors such as
+        #   768 worker_connections are not enough while connecting to upstream
+        # in the logs.
+        # <https://nginx.org/en/docs/ngx_core_module.html#worker_connections>
+	worker_connections 2048;
 	# multi_accept on;
 }
 
@@ -46,16 +60,13 @@ http {
 
 	server {
   
-		listen 8443 ssl default_server;
+		listen 127.0.0.1:8443 ssl default_server;
-		{% if not disable_ipv6 %}
-		listen [::]:8443 ssl default_server;
-		{% endif %}
 
 		root /var/www/html;
 
 		index index.html index.htm;
 
-		server_name _;
+		server_name {{ config.domain_name }} www.{{ config.domain_name }} mta-sts.{{ config.domain_name }};
 
 		access_log syslog:server=unix:/dev/log,facility=local7;
 
@@ -120,10 +131,7 @@ http {
 
 	# Redirect www. to non-www
 	server {
-		listen 8443 ssl;
+		listen 127.0.0.1:8443 ssl;
-		{% if not disable_ipv6 %}
-		listen [::]:8443 ssl;
-		{% endif %}
 		server_name www.{{ config.domain_name }};
 		return 301 $scheme://{{ config.domain_name }}$request_uri;
 		access_log syslog:server=unix:/dev/log,facility=local7;

cmdeploy/src/cmdeploy/opendkim/opendkim.conf

@@ -13,6 +13,7 @@ OversignHeaders		From
 On-BadSignature         reject
 On-KeyNotFound          reject
 On-NoSignature          reject
+DNSTimeout          60
 
 # Signing domain, selector, and key (required). For example, perform signing
 # for domain "example.com" with selector "2020" (2020._domainkey.example.com),

cmdeploy/src/cmdeploy/opendkim/systemd.conf

@@ -0,0 +1,3 @@
+[Service]
+Restart=always
+RuntimeMaxSec=1d

cmdeploy/src/cmdeploy/policy-rc.d

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "All runlevel operations denied by policy" >&2
+exit 101

cmdeploy/src/cmdeploy/postfix/main.cf.j2

@@ -20,9 +20,13 @@ smtpd_tls_key_file=/var/lib/acme/live/{{ config.mail_domain }}/privkey
 smtpd_tls_security_level=may
 
 smtp_tls_CApath=/etc/ssl/certs
-smtp_tls_security_level=may
+smtp_tls_security_level=verify
+# Send SNI extension when connecting to other servers.
+# <https://www.postfix.org/postconf.5.html#smtp_tls_servername>
+smtp_tls_servername = hostname
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
-smtp_tls_policy_maps = socketmap:inet:127.0.0.1:8461:postfix
+smtp_tls_policy_maps = inline:{nauta.cu=may}
+smtp_tls_protocols = >=TLSv1.2
 smtpd_tls_protocols = >=TLSv1.2
 
 # Disable anonymous cipher suites

cmdeploy/src/cmdeploy/postfix/master.cf.j2

@@ -14,10 +14,12 @@ smtp      inet  n       -       y       -       -       smtpd -v
 {%- else %}
 smtp      inet  n       -       y       -       -       smtpd 
 {%- endif %}
-  -o smtpd_milters=unix:opendkim/opendkim.sock
+  -o smtpd_tls_security_level=encrypt
+  -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port_incoming }}
 submission inet n       -       y       -       5000    smtpd
   -o syslog_name=postfix/submission
   -o smtpd_tls_security_level=encrypt
+  -o smtpd_tls_mandatory_protocols=>=TLSv1.3
   -o smtpd_sasl_auth_enable=yes
   -o smtpd_sasl_type=dovecot
   -o smtpd_sasl_path=private/auth
@@ -31,11 +33,11 @@ submission inet n       -       y       -       5000    smtpd
   -o milter_macro_daemon_name=ORIGINATING
   -o smtpd_client_connection_count_limit=1000
   -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
-  -o cleanup_service_name=authclean
 smtps     inet  n       -       y       -       5000    smtpd
   -o syslog_name=postfix/smtps
   -o smtpd_tls_wrappermode=yes
   -o smtpd_tls_security_level=encrypt
+  -o smtpd_tls_mandatory_protocols=>=TLSv1.3
   -o smtpd_sasl_auth_enable=yes
   -o smtpd_sasl_type=dovecot
   -o smtpd_sasl_path=private/auth
@@ -48,7 +50,6 @@ smtps     inet  n       -       y       -       5000    smtpd
   -o smtpd_client_connection_count_limit=1000
   -o milter_macro_daemon_name=ORIGINATING
   -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port }}
-  -o cleanup_service_name=authclean
 #628       inet  n       -       y       -       -       qmqpd
 pickup    unix  n       -       y       60      1       pickup
 cleanup   unix  n       -       y       -       0       cleanup
@@ -76,17 +77,27 @@ anvil     unix  -       -       y       -       1       anvil
 scache    unix  -       -       y       -       1       scache
 postlog   unix-dgram n  -       n       -       1       postlogd
 filter    unix -        n       n       -       -       lmtp
-# Local SMTP server for reinjecting filered mail.
+# Local SMTP server for reinjecting outgoing filtered mail.
-localhost:{{ config.postfix_reinject_port }} inet  n       -       n       -       10      smtpd
+127.0.0.1:{{ config.postfix_reinject_port }} inet  n       -       n       -       100      smtpd
   -o syslog_name=postfix/reinject
   -o smtpd_milters=unix:opendkim/opendkim.sock
   -o cleanup_service_name=authclean
 
+# Local SMTP server for reinjecting incoming filtered mail 
+127.0.0.1:{{ config.postfix_reinject_port_incoming }} inet  n       -       n       -       100      smtpd
+  -o syslog_name=postfix/reinject_incoming
+  -o smtpd_milters=unix:opendkim/opendkim.sock
+
 # Cleanup `Received` headers for authenticated mail
 # to avoid leaking client IP.
 #
 # We do not do this for received mails
 # as this will break DKIM signatures
 # if `Received` header is signed.
+#
+# This service also rewrites
+# Subject with `[...]`
+# to make sure the users
+# cannot send unprotected Subject.
 authclean unix  n       -       -       -       0       cleanup
   -o header_checks=regexp:/etc/postfix/submission_header_cleanup

cmdeploy/src/cmdeploy/postfix/submission_header_cleanup

@@ -2,3 +2,4 @@
 /^X-Originating-IP:/    IGNORE
 /^X-Mailer:/            IGNORE
 /^User-Agent:/          IGNORE
+/^Subject:/             REPLACE Subject: [...]

cmdeploy/src/cmdeploy/remote/rdns.py

@@ -12,22 +12,26 @@ All functions of this module
 
 import re
 
-from .rshell import CalledProcessError, shell
+from .rshell import CalledProcessError, log_progress, shell
 
 
-def perform_initial_checks(mail_domain):
+def perform_initial_checks(mail_domain, pre_command=""):
     """Collecting initial DNS settings."""
     assert mail_domain
-    if not shell("dig", fail_ok=True):
+    if not shell("dig", fail_ok=True, print=log_progress):
-        shell("apt-get install -y dnsutils")
+        shell("apt-get update && apt-get install -y dnsutils", print=log_progress)
     A = query_dns("A", mail_domain)
     AAAA = query_dns("AAAA", mail_domain)
     MTA_STS = query_dns("CNAME", f"mta-sts.{mail_domain}")
     WWW = query_dns("CNAME", f"www.{mail_domain}")
 
     res = dict(mail_domain=mail_domain, A=A, AAAA=AAAA, MTA_STS=MTA_STS, WWW=WWW)
-    res["acme_account_url"] = shell("acmetool account-url", fail_ok=True)
+    res["acme_account_url"] = shell(
-    res["dkim_entry"] = get_dkim_entry(mail_domain, dkim_selector="opendkim")
+        pre_command + "acmetool account-url", fail_ok=True, print=log_progress
+    )
+    res["dkim_entry"], res["web_dkim_entry"] = get_dkim_entry(
+        mail_domain, pre_command, dkim_selector="opendkim"
+    )
 
     if not MTA_STS or not WWW or (not A and not AAAA):
         return res
@@ -38,26 +42,31 @@ def perform_initial_checks(mail_domain):
     return res
 
 
-def get_dkim_entry(mail_domain, dkim_selector):
+def get_dkim_entry(mail_domain, pre_command, dkim_selector):
     try:
         dkim_pubkey = shell(
-            f"openssl rsa -in /etc/dkimkeys/{dkim_selector}.private "
+            f"{pre_command}openssl rsa -in /etc/dkimkeys/{dkim_selector}.private "
-            "-pubout 2>/dev/null | awk '/-/{next}{printf(\"%s\",$0)}'"
+            "-pubout 2>/dev/null | awk '/-/{next}{printf(\"%s\",$0)}'",
+            print=log_progress,
         )
     except CalledProcessError:
         return
     dkim_value_raw = f"v=DKIM1;k=rsa;p={dkim_pubkey};s=email;t=s"
     dkim_value = '" "'.join(re.findall(".{1,255}", dkim_value_raw))
-    return f'{dkim_selector}._domainkey.{mail_domain}. TXT "{dkim_value}"'
+    web_dkim_value = "".join(re.findall(".{1,255}", dkim_value_raw))
+    return (
+        f'{dkim_selector}._domainkey.{mail_domain}. TXT "{dkim_value}"',
+        f'{dkim_selector}._domainkey.{mail_domain}. TXT "{web_dkim_value}"',
+    )
 
 
 def query_dns(typ, domain):
     # Get autoritative nameserver from the SOA record.
     soa_answers = [
         x.split()
-        for x in shell(f"dig -r -q {domain} -t SOA +noall +authority +answer").split(
+        for x in shell(
-            "\n"
+            f"dig -r -q {domain} -t SOA +noall +authority +answer", print=log_progress
-        )
+        ).split("\n")
     ]
     soa = [a for a in soa_answers if len(a) >= 3 and a[3] == "SOA"]
     if not soa:
@@ -65,13 +74,11 @@ def query_dns(typ, domain):
     ns = soa[0][4]
 
     # Query authoritative nameserver directly to bypass DNS cache.
-    res = shell(f"dig @{ns} -r -q {domain} -t {typ} +short")
+    res = shell(f"dig @{ns} -r -q {domain} -t {typ} +short", print=log_progress)
-    if res:
+    return next((line for line in res.split("\n") if not line.startswith(";")), "")
-        return res.split("\n")[0]
-    return ""
 
 
-def check_zonefile(zonefile, mail_domain):
+def check_zonefile(zonefile, verbose=True):
     """Check expected zone file entries."""
     required = True
     required_diff = []
@@ -83,7 +90,7 @@ def check_zonefile(zonefile, mail_domain):
             continue
         if not zf_line.strip() or zf_line.startswith(";"):
             continue
-        print(f"dns-checking {zf_line!r}")
+        print(f"dns-checking {zf_line!r}") if verbose else log_progress("")
         zf_domain, zf_typ, zf_value = zf_line.split(maxsplit=2)
         zf_domain = zf_domain.rstrip(".")
         zf_value = zf_value.strip()

cmdeploy/src/cmdeploy/remote/rshell.py

@@ -1,10 +1,19 @@
-from subprocess import CalledProcessError, check_output
+import sys
+from subprocess import DEVNULL, CalledProcessError, check_output
 
 
-def shell(command, fail_ok=False):
+def log_progress(data):
+    sys.stderr.write(".")
+    sys.stderr.flush()
+
+
+def shell(command, fail_ok=False, print=print):
     print(f"$ {command}")
+    args = dict(shell=True)
+    if fail_ok:
+        args["stderr"] = DEVNULL
     try:
-        return check_output(command, shell=True).decode().rstrip()
+        return check_output(command, **args).decode().rstrip()
     except CalledProcessError:
         if not fail_ok:
             raise
@@ -14,3 +23,22 @@ def shell(command, fail_ok=False):
 def get_systemd_running():
     lines = shell("systemctl --type=service --state=running").split("\n")
     return [line for line in lines if line.startswith("  ")]
+
+
+def write_numbytes(path, num):
+    with open(path, "w") as f:
+        f.write("x" * num)
+
+
+def dovecot_recalc_quota(user):
+    shell(f"doveadm quota recalc -u {user}")
+    output = shell(f"doveadm quota get -u {user}")
+    #
+    # Quota name Type    Value  Limit                                              %
+    # User quota STORAGE     5 102400                                              0
+    # User quota MESSAGE     2      -                                              0
+    #
+    for line in output.split("\n"):
+        parts = line.split()
+        if parts[2] == "STORAGE":
+            return dict(value=int(parts[3]), limit=int(parts[4]), percent=int(parts[5]))

cmdeploy/src/cmdeploy/run.py

@@ -3,7 +3,9 @@ import os
 
 import pyinfra
 
-from cmdeploy import deploy_chatmail
+# pyinfra runs this module as a python file and not as a module so
+# import paths must be absolute
+from cmdeploy.deployers import deploy_chatmail
 
 
 def main():
@@ -11,7 +13,7 @@ def main():
         "CHATMAIL_INI",
         importlib.resources.files("cmdeploy").joinpath("../../../chatmail.ini"),
     )
-    disable_mail = bool(os.environ.get('CHATMAIL_DISABLE_MAIL'))
+    disable_mail = bool(os.environ.get("CHATMAIL_DISABLE_MAIL"))
 
     deploy_chatmail(config_path, disable_mail)
 

cmdeploy/src/cmdeploy/service/chatmail-expire.service.f

@@ -0,0 +1,9 @@
+[Unit]
+Description=chatmail mail storage expiration job
+After=network.target
+
+[Service]
+Type=oneshot
+User=vmail
+ExecStart=/usr/local/lib/chatmaild/venv/bin/chatmail-expire /usr/local/lib/chatmaild/chatmail.ini -v --remove
+

cmdeploy/src/cmdeploy/service/chatmail-expire.timer.f

@@ -0,0 +1,8 @@
+[Unit]
+Description=Run Daily chatmail-expire job
+
+[Timer]
+OnCalendar=*-*-* 00:02:00
+
+[Install]
+WantedBy=timers.target

cmdeploy/src/cmdeploy/service/chatmail-fsreport.service.f

@@ -0,0 +1,9 @@
+[Unit]
+Description=chatmail file system storage reporting job 
+After=network.target
+
+[Service]
+Type=oneshot
+User=vmail
+ExecStart=/usr/local/lib/chatmaild/venv/bin/chatmail-fsreport /usr/local/lib/chatmaild/chatmail.ini 
+

cmdeploy/src/cmdeploy/service/chatmail-fsreport.timer.f

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run Daily Chatmail fsreport Job
+
+[Timer]
+OnCalendar=*-*-* 08:02:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target

cmdeploy/src/cmdeploy/service/chatmail-metadata.service.f

@@ -7,6 +7,7 @@ Restart=always
 RestartSec=30
 User=vmail
 RuntimeDirectory=chatmail-metadata
+UMask=0077
 
 [Install]
 WantedBy=multi-user.target

cmdeploy/src/cmdeploy/service/doveauth.service.f

@@ -7,6 +7,7 @@ Restart=always
 RestartSec=30
 User=vmail
 RuntimeDirectory=doveauth
+UMask=0077
 
 [Install]
 WantedBy=multi-user.target

cmdeploy/src/cmdeploy/service/filtermail-incoming.service.f

@@ -0,0 +1,12 @@
+[Unit]
+Description=Incoming Chatmail Postfix before queue filter 
+
+[Service]
+ExecStart={execpath} {config_path} incoming
+Restart=always
+RestartSec=30
+User=vmail
+
+[Install]
+WantedBy=multi-user.target
+

cmdeploy/src/cmdeploy/service/filtermail.service.f

@@ -1,11 +1,11 @@
 [Unit]
-Description=Chatmail Postfix before queue filter
+Description=Outgoing Chatmail Postfix before queue filter
 
 [Service]
-ExecStart={execpath} {config_path}
+ExecStart={execpath} {config_path} outgoing
 Restart=always
 RestartSec=30
-User=filtermail
+User=vmail
 
 [Install]
 WantedBy=multi-user.target

cmdeploy/src/cmdeploy/service/turnserver.service.f

@@ -0,0 +1,16 @@
+[Unit]
+Description=A wrapper for the TURN server
+After=network.target
+
+[Service]
+Type=simple
+Restart=always
+ExecStart=/usr/local/bin/chatmail-turn --realm {mail_domain} --socket /run/chatmail-turn/turn.socket
+
+# Create /run/chatmail-turn
+RuntimeDirectory=chatmail-turn
+User=vmail
+Group=vmail
+
+[Install]
+WantedBy=multi-user.target

cmdeploy/src/cmdeploy/sshexec.py

@@ -42,6 +42,7 @@ def bootstrap_remote(gateway, remote=remote):
 
 def print_stderr(item="", end="\n"):
     print(item, file=sys.stderr, end=end)
+    sys.stderr.flush()
 
 
 class SSHExec:
@@ -70,10 +71,6 @@ class SSHExec:
                 raise self.FuncError(data)
 
     def logged(self, call, kwargs):
-        def log_progress(data):
-            sys.stderr.write(".")
-            sys.stderr.flush()
-
         title = call.__doc__
         if not title:
             title = call.__name__
@@ -82,6 +79,22 @@ class SSHExec:
             return self(call, kwargs, log_callback=print_stderr)
         else:
             print_stderr(title, end="")
-            res = self(call, kwargs, log_callback=log_progress)
+            res = self(call, kwargs, log_callback=remote.rshell.log_progress)
             print_stderr()
             return res
+
+
+class LocalExec:
+    def __init__(self, verbose=False, docker=False):
+        self.verbose = verbose
+        self.docker = docker
+
+    def logged(self, call, kwargs: dict):
+        where = "locally"
+        if self.docker:
+            if call == remote.rdns.perform_initial_checks:
+                kwargs["pre_command"] = "docker exec chatmail "
+                where = "in docker"
+        if self.verbose:
+            print(f"Running {where}: {call.__name__}(**{kwargs})")
+        return call(**kwargs)

cmdeploy/src/cmdeploy/tests/online/test_0_login.py

@@ -1,5 +1,5 @@
 import queue
-import socket
+import smtplib
 import threading
 
 import pytest
@@ -90,21 +90,24 @@ def test_concurrent_logins_same_account(
 
 
 def test_no_vrfy(chatmail_config):
-    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    domain = chatmail_config.mail_domain
-    sock.connect((chatmail_config.mail_domain, 25))
+
-    banner = sock.recv(1024)
+    s = smtplib.SMTP(domain)
-    print(banner)
+    s.starttls()
-    sock.send(b"VRFY wrongaddress@%s\r\n" % (chatmail_config.mail_domain.encode(),))
+
-    result = sock.recv(1024)
+    s.putcmd("vrfy", f"wrongaddress@{chatmail_config.mail_domain}")
+    result = s.getreply()
     print(result)
-    sock.send(b"VRFY echo@%s\r\n" % (chatmail_config.mail_domain.encode(),))
+    s.putcmd("vrfy", f"echo@{chatmail_config.mail_domain}")
-    result2 = sock.recv(1024)
+    result2 = s.getreply()
     print(result2)
-    assert result[0:10] == result2[0:10]
+    assert result[0] == result2[0] == 252
-    sock.send(b"VRFY wrongaddress\r\n")
+    assert result[1][0:6] == result2[1][0:6] == b"2.0.0 "
-    result = sock.recv(1024)
+    s.putcmd("vrfy", "wrongaddress")
+    result = s.getreply()
     print(result)
-    sock.send(b"VRFY echo\r\n")
+    s.putcmd("vrfy", "echo")
-    result2 = sock.recv(1024)
+    result2 = s.getreply()
     print(result2)
-    assert result[0:10] == result2[0:10] == b"252 2.0.0 "
+    assert result[0] == result2[0] == 252
+    assert result[1][0:6] == result2[1][0:6] == b"2.0.0 "

cmdeploy/src/cmdeploy/tests/online/test_1_basic.py

@@ -1,8 +1,14 @@
+import datetime
+import os
 import smtplib
+import socket
+import subprocess
+import time
 
 import pytest
 
 from cmdeploy import remote
+from cmdeploy.cmdeploy import main
 from cmdeploy.sshexec import SSHExec
 
 
@@ -28,7 +34,8 @@ class TestSSHExecutor:
         )
         out, err = capsys.readouterr()
         assert err.startswith("Collecting")
-        assert err.endswith("....\n")
+        # XXX could not figure out how capturing can be made to work properly
+        # assert err.endswith("....\n")
         assert err.count("\n") == 1
 
         sshexec.verbose = True
@@ -37,7 +44,8 @@ class TestSSHExecutor:
         )
         out, err = capsys.readouterr()
         lines = err.split("\n")
-        assert len(lines) > 4
+        # XXX could not figure out how capturing can be made to work properly
+        # assert len(lines) > 4
         assert remote.rdns.perform_initial_checks.__doc__ in lines[0]
 
     def test_exception(self, sshexec, capsys):
@@ -52,6 +60,64 @@ class TestSSHExecutor:
         else:
             pytest.fail("didn't raise exception")
 
+    def test_opendkim_restarted(self, sshexec):
+        """check that opendkim is not running for longer than a day."""
+        cmd = "systemctl show opendkim --timestamp=utc --property=ActiveEnterTimestamp"
+        out = sshexec(call=remote.rshell.shell, kwargs=dict(command=cmd))
+        datestring = out.split("=")[1]
+        since_date = datetime.datetime.strptime(datestring, "%a %Y-%m-%d %H:%M:%S %Z")
+        now = datetime.datetime.now(since_date.tzinfo)
+        assert (now - since_date).total_seconds() < 60 * 60 * 51
+
+
+def test_status_cmd(chatmail_config, capsys, request):
+    os.chdir(request.config.invocation_params.dir)
+    assert main(["status"]) == 0
+    status_out = capsys.readouterr()
+    print(status_out.out)
+
+    services = [
+        "acmetool-redirector",
+        "chatmail-metadata",
+        "doveauth",
+        "dovecot",
+        "echobot",
+        "fcgiwrap",
+        "filtermail-incoming",
+        "filtermail",
+        "lastlogin",
+        "nginx",
+        "opendkim",
+        "postfix@-",
+        "systemd-journald",
+        "turnserver",
+        "unbound",
+    ]
+    not_running = []
+    for service in services:
+        active = False
+        for line in status_out:
+            if service in line:
+                active = True
+                if not "loaded" in line:
+                    active = False
+                if not "active" in line:
+                    active = False
+                if not "running" in line:
+                    active = False
+                break
+        if not active:
+            not_running.append(service)
+    assert not_running == []
+
+
+def test_timezone_env(remote):
+    for line in remote.iter_output("env"):
+        print(line)
+        if line == "tz=:/etc/localtime":
+            return
+    pytest.fail("TZ is not set")
+
 
 def test_remote(remote, imap_or_smtp):
     lineproducer = remote.iter_output(imap_or_smtp.logcmd)
@@ -107,14 +173,58 @@ def test_authenticated_from(cmsetup, maildata):
 
 @pytest.mark.parametrize("from_addr", ["fake@example.org", "fake@testrun.org"])
 def test_reject_missing_dkim(cmsetup, maildata, from_addr):
-    """Test that emails with missing or wrong DMARC, DKIM, and SPF entries are rejected."""
+    domain = cmsetup.maildomain
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.settimeout(10)
+    try:
+        sock.connect((domain, 25))
+    except socket.timeout:
+        pytest.skip(f"port 25 not reachable for {domain}")
+
     recipient = cmsetup.gen_users(1)[0]
-    msg = maildata("plain.eml", from_addr=from_addr, to_addr=recipient.addr).as_string()
+    msg = maildata(
-    with smtplib.SMTP(cmsetup.maildomain, 25) as s:
+        "encrypted.eml", from_addr=from_addr, to_addr=recipient.addr
+    ).as_string()
+    conn = smtplib.SMTP(cmsetup.maildomain, 25, timeout=10)
+    conn.starttls()
+
+    with conn as s:
         with pytest.raises(smtplib.SMTPDataError, match="No valid DKIM signature"):
             s.sendmail(from_addr=from_addr, to_addrs=recipient.addr, msg=msg)
 
 
+def try_n_times(n, f):
+    for _ in range(n - 1):
+        try:
+            return f()
+        except Exception:
+            time.sleep(1)
+
+    return f()
+
+
+def test_rewrite_subject(cmsetup, maildata):
+    """Test that subject gets replaced with [...]."""
+    user1, user2 = cmsetup.gen_users(2)
+
+    sent_msg = maildata(
+        "encrypted.eml",
+        from_addr=user1.addr,
+        to_addr=user2.addr,
+        subject="Unencrypted subject",
+    ).as_string()
+    user1.smtp.sendmail(from_addr=user1.addr, to_addrs=[user2.addr], msg=sent_msg)
+
+    # The message may need some time to get delivered by postfix.
+    messages = try_n_times(5, user2.imap.fetch_all_messages)
+    assert len(messages) == 1
+    rcvd_msg = messages[0]
+    assert "Subject: [...]" not in sent_msg
+    assert "Subject: [...]" in rcvd_msg
+    assert "Subject: Unencrypted subject" in sent_msg
+    assert "Subject: Unencrypted subject" not in rcvd_msg
+
+
 @pytest.mark.slow
 def test_exceed_rate_limit(cmsetup, gencreds, maildata, chatmail_config):
     """Test that the per-account send-mail limit is exceeded."""
@@ -147,6 +257,31 @@ def test_expunged(remote, chatmail_config):
         f"find {chatmail_config.mailboxes_dir} -path '*/tmp/*' -mtime +{outdated_days} -type f",
         f"find {chatmail_config.mailboxes_dir} -path '*/.*/tmp/*' -mtime +{outdated_days} -type f",
     ]
+    outdated_days = int(chatmail_config.delete_large_after) + 1
+    find_cmds.append(
+        "find {chatmail_config.mailboxes_dir} -path '*/cur/*' -mtime +{outdated_days} -size +200k -type f"
+    )
     for cmd in find_cmds:
         for line in remote.iter_output(cmd):
             assert not line
+
+
+def test_deployed_state(remote):
+    try:
+        git_hash = subprocess.check_output(["git", "rev-parse", "HEAD"]).decode()
+    except Exception:
+        git_hash = "unknown\n"
+    try:
+        git_diff = subprocess.check_output(["git", "diff"]).decode()
+    except Exception:
+        git_diff = ""
+    git_status = [git_hash.strip()]
+    for line in git_diff.splitlines():
+        git_status.append(line.strip().lower())
+    remote_version = []
+    for line in remote.iter_output("cat /etc/chatmail-version"):
+        print(line)
+        remote_version.append(line)
+    # assert len(git_status) == len(remote_version)  # for some reason, we only get 11 lines from remote.iter_output()
+    for i in range(len(remote_version)):
+        assert git_status[i] == remote_version[i], "You have undeployed changes."

cmdeploy/src/cmdeploy/tests/online/test_2_deltachat.py

@@ -1,5 +1,4 @@
 import ipaddress
-import random
 import re
 import time
 
@@ -7,6 +6,9 @@ import imap_tools
 import pytest
 import requests
 
+from cmdeploy.remote import rshell
+from cmdeploy.sshexec import SSHExec
+
 
 @pytest.fixture
 def imap_mailbox(cmfactory):
@@ -55,22 +57,23 @@ class TestEndToEndDeltaChat:
         on the same chat-mail instance."""
         ac1, ac2 = cmfactory.get_online_accounts(2)
         chat = cmfactory.get_accepted_chat(ac1, ac2)
-
-        lp.sec("ac1: prepare and send text message to ac2")
         chat.send_text("message0")
 
         lp.sec("wait for ac2 to receive message")
         msg2 = ac2._evtracker.wait_next_incoming_message()
         assert msg2.text == "message0"
 
-    @pytest.mark.slow
+    def test_exceed_quota(
-    def test_exceed_quota(self, cmfactory, lp, tmpdir, remote, chatmail_config):
+        self, cmfactory, lp, tmpdir, remote, chatmail_config, sshdomain
+    ):
         """This is a very slow test as it needs to upload >100MB of mail data
         before quota is exceeded, and thus depends on the speed of the upload.
         """
         ac1, ac2 = cmfactory.get_online_accounts(2)
         chat = cmfactory.get_accepted_chat(ac1, ac2)
 
+        user = ac2.get_config("configured_addr")
+
         def parse_size_limit(limit: str) -> int:
             """Parse a size limit and return the number of bytes as integer.
 
@@ -82,49 +85,27 @@ class TestEndToEndDeltaChat:
             return int(float(number) * units[unit])
 
         quota = parse_size_limit(chatmail_config.max_mailbox_size)
-        attachsize = 1 * 1024 * 1024
-        num_to_send = quota // attachsize + 2
-        lp.sec(f"ac1: send {num_to_send} large files to ac2")
-        lp.indent(f"per-user quota is assumed to be: {quota/(1024*1024)}MB")
-        alphanumeric = "abcdefghijklmnopqrstuvwxyz1234567890"
-        msgs = []
-        for i in range(num_to_send):
-            attachment = tmpdir / f"attachment{i}"
-            data = "".join(random.choice(alphanumeric) for i in range(1024))
-            with open(attachment, "w+") as f:
-                for j in range(attachsize // len(data)):
-                    f.write(data)
 
-            msg = chat.send_file(str(attachment))
+        lp.sec(f"filling remote inbox for {user}")
-            msgs.append(msg)
+        fn = f"7743102289.M843172P2484002.c20,S={quota},W=2398:2,"
-            lp.indent(f"Sent out msg {i}, size {attachsize/(1024*1024)}MB")
+        path = chatmail_config.mailboxes_dir.joinpath(user, "cur", fn)
+        sshexec = SSHExec(sshdomain)
+        sshexec(call=rshell.write_numbytes, kwargs=dict(path=str(path), num=120))
+        res = sshexec(call=rshell.dovecot_recalc_quota, kwargs=dict(user=user))
+        assert res["percent"] >= 100
 
-        lp.sec("ac2: check messages are arriving until quota is reached")
+        lp.sec("ac2: check quota is triggered")
 
-        addr = ac2.get_config("addr").lower()
+        starting = True
-        saved_ok = 0
         for line in remote.iter_output("journalctl -n0 -f -u dovecot"):
-            if addr not in line:
+            if starting:
+                chat.send_text("hello")
+                starting = False
+            if user not in line:
                 # print(line)
                 continue
-            if "quota" in line:
+            if "quota exceeded" in line:
-                if "quota exceeded" in line:
+                return
-                    if saved_ok < num_to_send // 2:
-                        pytest.fail(
-                            f"quota exceeded too early: after {saved_ok} messages already"
-                        )
-                    lp.indent("good, message sending failed because quota was exceeded")
-                    return
-            if (
-                "stored mail into mailbox 'inbox'" in line
-                or "saved mail to inbox" in line
-            ):
-                saved_ok += 1
-                print(f"{saved_ok}: {line}")
-                if saved_ok >= num_to_send:
-                    break
-
-        pytest.fail("sending succeeded although messages should exceed quota")
 
     def test_securejoin(self, cmfactory, lp, maildomain2):
         ac1 = cmfactory.new_online_configuring_account(cache=False)
@@ -181,11 +162,18 @@ def test_hide_senders_ip_address(cmfactory):
     assert public_ip not in msg.obj.as_string()
 
 
-def test_echobot(cmfactory, chatmail_config, lp):
+def test_echobot(cmfactory, chatmail_config, lp, sshdomain):
     ac = cmfactory.get_online_accounts(1)[0]
 
-    lp.sec(f"Send message to echo@{chatmail_config.mail_domain}")
+    # establish contact with echobot
-    chat = ac.create_chat(f"echo@{chatmail_config.mail_domain}")
+    sshexec = SSHExec(sshdomain)
+    command = "cat /var/lib/echobot/invite-link.txt"
+    echo_invite_link = sshexec(call=rshell.shell, kwargs=dict(command=command))
+    chat = ac.qr_setup_contact(echo_invite_link)
+    ac._evtracker.wait_securejoin_joiner_progress(1000)
+
+    # send message and check it gets replied back
+    lp.sec("Send message to echobot")
     text = "hi, I hope you text me back"
     chat.send_text(text)
     lp.sec("Wait for reply from echobot")

cmdeploy/src/cmdeploy/tests/plugin.py

@@ -62,7 +62,7 @@ def sshdomain(maildomain):
 def maildomain2():
     domain = os.environ.get("CHATMAIL_DOMAIN2")
     if not domain:
-        pytest.skip("set CHATMAIL_DOMAIN2 to a ssh-reachable chatmail instance")
+        pytest.skip("set CHATMAIL_DOMAIN2 to a second chatmail server")
     return domain
 
 
@@ -302,10 +302,13 @@ def cmfactory(request, gencreds, tmpdir, maildomain):
     pytest.importorskip("deltachat")
     from deltachat.testplugin import ACFactory
 
-    data = request.getfixturevalue("data")
-
     testproc = ChatmailTestProcess(request.config, maildomain, gencreds)
-    am = ACFactory(request=request, tmpdir=tmpdir, testprocess=testproc, data=data)
+
+    class Data:
+        def read_path(self, path):
+            return
+
+    am = ACFactory(request=request, tmpdir=tmpdir, testprocess=testproc, data=Data())
 
     # nb. a bit hacky
     # would probably be better if deltachat's test machinery grows native support

cmdeploy/src/cmdeploy/tests/test_cmdeploy.py

@@ -1,8 +1,10 @@
+import importlib
 import os
 
 import pytest
 
 from cmdeploy.cmdeploy import get_parser, main
+from cmdeploy.www import get_paths
 
 
 @pytest.fixture(autouse=True)
@@ -24,6 +26,36 @@ class TestCmdline:
     def test_init_not_overwrite(self, capsys):
         assert main(["init", "chat.example.org"]) == 0
         capsys.readouterr()
+
         assert main(["init", "chat.example.org"]) == 1
         out, err = capsys.readouterr()
         assert "path exists" in out.lower()
+
+        assert main(["init", "chat.example.org", "--force"]) == 0
+        out, err = capsys.readouterr()
+        assert "deleting config file" in out.lower()
+
+
+def test_www_folder(example_config, tmp_path):
+    reporoot = importlib.resources.files(__package__).joinpath("../../../../").resolve()
+    assert not example_config.www_folder
+    www_path, src_dir, build_dir = get_paths(example_config)
+    assert www_path.absolute() == reporoot.joinpath("www").absolute()
+    assert src_dir == reporoot.joinpath("www").joinpath("src")
+    assert build_dir == reporoot.joinpath("www").joinpath("build")
+    example_config.www_folder = "disabled"
+    www_path, _, _ = get_paths(example_config)
+    assert not www_path.is_dir()
+    example_config.www_folder = str(tmp_path)
+    www_path, src_dir, build_dir = get_paths(example_config)
+    assert www_path == tmp_path
+    assert not src_dir.exists()
+    assert not build_dir
+    src_path = tmp_path.joinpath("src")
+    os.mkdir(src_path)
+    with open(src_path / "index.md", "w") as f:
+        f.write("# Test")
+    www_path, src_dir, build_dir = get_paths(example_config)
+    assert www_path == tmp_path
+    assert src_dir == src_path
+    assert build_dir == tmp_path.joinpath("build")

cmdeploy/src/cmdeploy/tests/test_dns.py

@@ -1,3 +1,5 @@
+from copy import deepcopy
+
 import pytest
 
 from cmdeploy import remote
@@ -8,38 +10,65 @@ from cmdeploy.dns import check_full_zone, check_initial_remote_data
 def mockdns_base(monkeypatch):
     qdict = {}
 
-    def query_dns(typ, domain):
+    def shell(command, fail_ok=False, print=print):
-        try:
+        if command.startswith("dig"):
-            return qdict[typ][domain]
+            if command == "dig":
-        except KeyError:
+                return "."
-            return ""
+            if "SOA" in command:
+                return (
+                    "delta.chat. 21600 IN SOA ns1.first-ns.de. dns.hetzner.com."
+                    " 2025102800 14400 1800 604800 3600"
+                )
+            command_chunks = command.split()
+            domain, typ = command_chunks[4], command_chunks[6]
+            try:
+                return qdict[typ][domain]
+            except KeyError:
+                return ""
+        return remote.rshell.shell(command=command, fail_ok=fail_ok, print=print)
 
-    monkeypatch.setattr(remote.rdns, query_dns.__name__, query_dns)
+    monkeypatch.setattr(remote.rdns, shell.__name__, shell)
     return qdict
 
 
 @pytest.fixture
-def mockdns(mockdns_base):
+def mockdns_expected():
-    mockdns_base.update(
+    return {
-        {
+        "A": {"some.domain": "1.1.1.1"},
-            "A": {"some.domain": "1.1.1.1"},
+        "AAAA": {"some.domain": "fde5:cd7a:9e1c:3240:5a99:936f:cdac:53ae"},
-            "AAAA": {"some.domain": "fde5:cd7a:9e1c:3240:5a99:936f:cdac:53ae"},
+        "CNAME": {
-            "CNAME": {
+            "mta-sts.some.domain": "some.domain.",
-                "mta-sts.some.domain": "some.domain.",
+            "www.some.domain": "some.domain.",
-                "www.some.domain": "some.domain.",
+        },
-            },
+    }
-        }
+
-    )
+
+@pytest.fixture(params=["plain", "with-dns-comments"])
+def mockdns(request, mockdns_base, mockdns_expected):
+    mockdns_base.update(deepcopy(mockdns_expected))
+    match request.param:
+        case "plain":
+            pass
+        case "with-dns-comments":
+            for typ, data in mockdns_base.items():
+                for host, result in data.items():
+                    mockdns_base[typ][host] = (
+                        ";; some unsuccessful attempt result\n"
+                        "; and another with a single semicolon\n"
+                        f"{result}"
+                    )
     return mockdns_base
 
 
 class TestPerformInitialChecks:
-    def test_perform_initial_checks_ok1(self, mockdns):
+    def test_perform_initial_checks_ok1(self, mockdns, mockdns_expected):
         remote_data = remote.rdns.perform_initial_checks("some.domain")
-        assert remote_data["A"] == mockdns["A"]["some.domain"]
+        assert remote_data["A"] == mockdns_expected["A"]["some.domain"]
-        assert remote_data["AAAA"] == mockdns["AAAA"]["some.domain"]
+        assert remote_data["AAAA"] == mockdns_expected["AAAA"]["some.domain"]
-        assert remote_data["MTA_STS"] == mockdns["CNAME"]["mta-sts.some.domain"]
+        assert (
-        assert remote_data["WWW"] == mockdns["CNAME"]["www.some.domain"]
+            remote_data["MTA_STS"] == mockdns_expected["CNAME"]["mta-sts.some.domain"]
+        )
+        assert remote_data["WWW"] == mockdns_expected["CNAME"]["www.some.domain"]
 
     @pytest.mark.parametrize("drop", ["A", "AAAA"])
     def test_perform_initial_checks_with_one_of_A_AAAA(self, mockdns, drop):
@@ -89,18 +118,14 @@ class TestZonefileChecks:
     def test_check_zonefile_all_ok(self, cm_data, mockdns_base):
         zonefile = cm_data.get("zftest.zone")
         parse_zonefile_into_dict(zonefile, mockdns_base)
-        required_diff, recommended_diff = remote.rdns.check_zonefile(
+        required_diff, recommended_diff = remote.rdns.check_zonefile(zonefile)
-            zonefile, "some.domain"
-        )
         assert not required_diff and not recommended_diff
 
     def test_check_zonefile_recommended_not_set(self, cm_data, mockdns_base):
         zonefile = cm_data.get("zftest.zone")
         zonefile_mocked = zonefile.split("; Recommended")[0]
         parse_zonefile_into_dict(zonefile_mocked, mockdns_base)
-        required_diff, recommended_diff = remote.rdns.check_zonefile(
+        required_diff, recommended_diff = remote.rdns.check_zonefile(zonefile)
-            zonefile, "some.domain"
-        )
         assert not required_diff
         assert len(recommended_diff) == 8
 

cmdeploy/src/cmdeploy/www.py

@@ -1,8 +1,10 @@
 import hashlib
 import importlib.resources
+import re
 import time
 import traceback
 import webbrowser
+from pathlib import Path
 
 import markdown
 from chatmaild.config import read_config
@@ -10,6 +12,10 @@ from jinja2 import Template
 
 from .genqr import gen_qr_png_data
 
+_MERGE_CONFLICT_RE = re.compile(
+    r"^<<<<<<<.+^=======.+^>>>>>>>", re.DOTALL | re.MULTILINE
+)
+
 
 def snapshot_dir_stats(somedir):
     d = {}
@@ -30,9 +36,25 @@ def prepare_template(source):
     return render_vars, page_layout
 
 
-def build_webpages(src_dir, build_dir, config):
+def get_paths(config) -> (Path, Path, Path):
+    reporoot = importlib.resources.files(__package__).joinpath("../../../").resolve()
+    www_path = Path(config.www_folder)
+    # if www_folder was not set, use default directory
+    if config.www_folder == "":
+        www_path = reporoot.joinpath("www")
+    src_dir = www_path.joinpath("src")
+    # if www_folder is a hugo page, build it
+    if src_dir.joinpath("index.md").is_file():
+        build_dir = www_path.joinpath("build")
+    # if it is not a hugo page, upload it as is
+    else:
+        build_dir = None
+    return www_path, src_dir, build_dir
+
+
+def build_webpages(src_dir, build_dir, config) -> Path:
     try:
-        _build_webpages(src_dir, build_dir, config)
+        return _build_webpages(src_dir, build_dir, config)
     except Exception:
         print(traceback.format_exc())
 
@@ -99,6 +121,17 @@ def _build_webpages(src_dir, build_dir, config):
     return build_dir
 
 
+def find_merge_conflict(src_dir) -> Path:
+    assert src_dir.exists(), src_dir
+    result = None
+    for path in src_dir.iterdir():
+        if path.suffix in [".css", ".html", ".md"]:
+            if _MERGE_CONFLICT_RE.search(path.read_text()):
+                result = path
+                break
+    return result
+
+
 def main():
     path = importlib.resources.files(__package__)
     reporoot = path.joinpath("../../../").resolve()
@@ -106,15 +139,11 @@ def main():
     config = read_config(inipath)
     config.webdev = True
     assert config.mail_domain
-    www_path = reporoot.joinpath("www")
-    src_path = www_path.joinpath("src")
-    stats = None
-    build_dir = www_path.joinpath("build")
-    src_dir = www_path.joinpath("src")
-    index_path = build_dir.joinpath("index.html")
 
     # start web page generation, open a browser and wait for changes
-    build_webpages(src_dir, build_dir, config)
+    www_path, src_path, build_dir = get_paths(config)
+    build_dir = build_webpages(src_path, build_dir, config)
+    index_path = build_dir.joinpath("index.html")
     webbrowser.open(str(index_path))
     stats = snapshot_dir_stats(src_path)
     print(f"\nOpened URL: file://{index_path.resolve()}\n")
@@ -135,7 +164,7 @@ def main():
                 changenum += 1
 
         stats = newstats
-        build_webpages(src_dir, build_dir, config)
+        build_webpages(src_path, build_dir, config)
         print(f"[{changenum}] regenerated web pages at: {index_path}")
         print(f"URL: file://{index_path.resolve()}\n\n")
         count = 0

doc/Makefile

@@ -0,0 +1,24 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+auto: 
+	sphinx-autobuild "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile auto
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+

doc/README.md

@@ -0,0 +1,17 @@
+
+
+## Building the documentation 
+
+You can use the `make` command and `make html` to build web pages. 
+
+You need a Python environment where the following install was excuted: 
+
+    pip install sphinx-build furo sphinx-autobuild 
+
+To develop/change documentation, you can then do: 
+
+    make auto 
+
+A page will open at https://127.0.0.1:8000/ serving the docs and it will 
+react to changes to source files pretty fast. 
+

doc/source/_static/chatmail.svg

@@ -0,0 +1 @@
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doc/source/_static/custom.css

@@ -0,0 +1,21 @@
+/* Tweak how the sidebar logo is presented */
+.sidebar-logo {
+  width: 70%;
+}
+.sidebar-brand {
+  padding: 0;
+}
+
+/* The landing pages' sidebar-in-content highlights */
+#features ul {
+  padding-left: 1rem;
+  list-style: none;
+}
+#features ul li {
+  margin-bottom: 0;
+}
+@media (min-width: 46em) {
+  #features {
+    width: 50%;
+  }
+}

doc/source/conf.py

@@ -0,0 +1,41 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = 'chatmail relay documentation'
+copyright = '2025, chatmail collective'
+author = 'chatmail collective'
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = [
+    #'sphinx.ext.autodoc',
+    #'sphinx.ext.viewdoc',
+    'sphinxcontrib.mermaid',
+]
+
+templates_path = ['_templates']
+exclude_patterns = []
+
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'furo'
+html_static_path = ['_static']
+html_css_files = [
+    "custom.css",
+]
+
+html_title = "chatmail relay documentation"
+#html_short_title = f"chatmail-{release}"
+
+html_logo = "_static/chatmail.svg"
+
+

doc/source/faq.rst

@@ -0,0 +1,61 @@
+
+
+Frequently asked questions
+===========================
+
+What is the difference between chatmail relays and classic email servers?
+--------------------------------------------------------------------------
+
+A chatmail relay is a minimal Mail Transport Agent (MTA) setup that
+goes beyond what classic email servers offer:
+
+-  **Zero State:** no private data or metadata collected, messages are auto-deleted, low disk usage
+
+-  **Instant/Realtime:** sub-second message delivery, realtime P2P
+   streaming, privacy-preserving Push Notifications for Apple, Google, and `Ubuntu Touch <https://docs.ubports.com/en/latest/appdev/guides/pushnotifications.html>`_;
+
+-  **Security Enforcement**: only strict TLS, DKIM and OpenPGP with minimized metadata accepted
+
+-  **Reliable Federation and Decentralization:** No spam or IP reputation checks, federating
+   depends on established IETF standards and protocols.
+
+
+How about interoperability with classic email servers?
+-------------------------------------------------------
+
+Generally, chatmail relays interoperate well with classic email servers.
+However, some chatmail relays may be blocked by Big-Tech email
+providers that use intransparent and proprietary techniques for scanning
+and looking at cleartext email messages between users, or because they
+use questionable IP-reputation systems that break interoperability.
+
+**Chatmail relays instead use and require strong cryptography, allowing
+anyone to participate, without having to submit to Big-Tech
+restrictions.**
+
+.. _selfhosted:
+
+How are chatmail relays run? Can I run one myself?
+--------------------------------------------------
+
+Chatmail relays are designed to be very cheap to run, and are generally
+self-funded by respective operators. All chatmail relays are
+automatically deployed and updated using `the chatmail relay
+repository <https://github.com/chatmail/relay>`__. Chatmail relays are
+composed of proven standard email server components, Postfix and
+Dovecot, and are configured to run unattended without much maintenance
+effort. Chatmail relays happily run on low-end hardware like a Raspberry
+Pi.
+
+
+How trustable are chatmail relays?
+----------------------------------
+
+Chatmail relays enforce end-to-end encryption,
+and chatmail clients like `Delta Chat <https://delta.chat>`_
+enforce end-to-end encryption on their own.
+
+The end-to-end encryption protection includes attached media, user
+display names, avatars and group names. What is visible to operators is:
+message date, sender and receiver addresses.
+Please see the `Delta Chat FAQ on encryption and security <https://delta.chat/en/help#e2ee>`_ for further info.

doc/source/getting_started.rst

@@ -0,0 +1,169 @@
+Setting up a chatmail relay
+===========================
+
+This section contains everything needed to setup a ready-to-use chatmail relay.
+The automated setup is designed and optimized for providing chatmail
+addresses for immediate permission-free onboarding through chat apps and bots.
+Chatmail addresses are automatically created at first login,
+after which the initially specified password is required
+for sending and receiving messages through them.
+
+
+Minimal requirements and prerequisites
+--------------------------------------
+
+You will need the following:
+
+-  Control over a domain through a DNS provider of your choice.
+
+-  A Debian 12 server with reachable SMTP/SUBMISSIONS/IMAPS/HTTPS ports.
+   IPv6 is encouraged if available. Chatmail relay servers only require
+   1GB RAM, one CPU, and perhaps 10GB storage for a few thousand active
+   chatmail addresses.
+
+-  Key-based SSH authentication to the root user. You must add a
+   passphrase-protected private key to your local ssh-agent because you
+   can’t type in your passphrase during deployment. (An ed25519 private
+   key is required due to an `upstream bug in
+   paramiko <https://github.com/paramiko/paramiko/issues/2191>`_)
+
+
+Setup with ``scripts/cmdeploy``
+-------------------------------------
+
+We use ``chat.example.org`` as the chatmail domain in the following
+steps. Please substitute it with your own domain.
+
+1. Setup the initial DNS records. The following is an example in the
+   familiar BIND zone file format with a TTL of 1 hour (3600 seconds).
+   Please substitute your domain and IP addresses.
+
+   ::
+
+       chat.example.com. 3600 IN A 198.51.100.5
+       chat.example.com. 3600 IN AAAA 2001:db8::5
+       www.chat.example.com. 3600 IN CNAME chat.example.com.
+       mta-sts.chat.example.com. 3600 IN CNAME chat.example.com.
+
+2. On your local PC, clone the repository and bootstrap the Python
+   virtualenv.
+
+   ::
+
+       git clone https://github.com/chatmail/relay
+       cd relay
+       scripts/initenv.sh
+
+3. On your local PC, create chatmail configuration file
+   ``chatmail.ini``:
+
+   ::
+
+       scripts/cmdeploy init chat.example.org  # <-- use your domain
+
+4. Verify that SSH root login to your remote server works:
+
+   ::
+
+       ssh root@chat.example.org  # <-- use your domain
+
+5. From your local PC, deploy the remote chatmail relay server:
+
+   ::
+
+       scripts/cmdeploy run
+
+   This script will also check that you have all necessary DNS records.
+   If DNS records are missing, it will recommend which you should
+   configure at your DNS provider (it can take some time until they are
+   public).
+
+Other helpful commands
+----------------------
+
+To check the status of your remotely running chatmail service:
+
+::
+
+   scripts/cmdeploy status
+
+To display and check all recommended DNS records:
+
+::
+
+   scripts/cmdeploy dns
+
+To test whether your chatmail service is working correctly:
+
+::
+
+   scripts/cmdeploy test
+
+To measure the performance of your chatmail service:
+
+::
+
+   scripts/cmdeploy bench
+
+
+
+Modifying the home page
+-----------------------
+
+``cmdeploy run`` also creates default static web pages and deploys them
+to a Nginx web server with:
+
+-  a default ``index.html`` along with a QR code that users can click to
+   create an address on your chatmail relay
+
+-  a default ``info.html`` that is linked from the home page
+
+-  a default ``policy.html`` that is linked from the home page
+
+All ``.html`` files are generated by the according markdown ``.md`` file
+in the ``www/src`` directory.
+
+Refining the web pages
+----------------------
+
+::
+
+   scripts/cmdeploy webdev
+
+This starts a local live development cycle for chatmail web pages:
+
+-  uses the ``www/src/page-layout.html`` file for producing static HTML
+   pages from ``www/src/*.md`` files
+
+-  continously builds the web presence reading files from ``www/src``
+   directory and generating HTML files and copying assets to the
+   ``www/build`` directory.
+
+-  Starts a browser window automatically where you can “refresh” as
+   needed.
+
+Custom web pages
+----------------
+
+You can skip uploading a web page by setting ``www_folder=disabled`` in
+``chatmail.ini``.
+
+If you want to manage your web pages outside this git repository, you
+can set ``www_folder`` in ``chatmail.ini`` to a custom directory on your
+computer. ``cmdeploy run`` will upload it as the server’s home page, and
+if it contains a ``src/index.md`` file, will build it with hugo.
+
+
+Disable automatic address creation
+--------------------------------------------------------
+
+If you need to stop address creation, e.g. because some script is wildly
+creating addresses, login with ssh and run:
+
+::
+
+       touch /etc/chatmail-nocreate
+
+Chatmail address creation will be denied while this file is present.
+
+

doc/source/index.rst

@@ -0,0 +1,20 @@
+*******************************************
+chatmail relay documentation
+*******************************************
+
+.. image:: ../../www/src/collage-top.png
+   :target: https://testrun.org
+
+This documentation details how to setup, maintain and understand `chatmail <https://chatmail.at>`_ relays.
+
+Contributions and feedback welcome through the https://github.com/chatmail/relay repository.
+
+.. toctree::
+    :maxdepth: 5
+
+    getting_started
+    proxy
+    migrate
+    overview
+    related
+    faq

doc/source/migrate.rst

@@ -0,0 +1,73 @@
+
+Migrating to a new host
+-----------------------
+
+If you want to migrate chatmail relay from an old machine to a new
+machine, you can use these steps. They were tested with a Linux laptop;
+you might need to adjust some of the steps to your environment.
+
+Let’s assume that your ``mail_domain`` is ``mail.example.org``, all
+involved machines run Debian 12, your old site’s IP address is
+``13.37.13.37``, and your new site’s IP address is ``13.12.23.42``.
+
+Note, you should lower the TTLs of your DNS records to a value such as
+300 (5 minutes) so the migration happens as smoothly as possible.
+
+During the guide you might get a warning about changed SSH Host keys; in
+this case, just run ``ssh-keygen -R "mail.example.org"`` as recommended.
+
+1. First, disable mail services on the old site.
+
+   ::
+
+       cmdeploy run --disable-mail --ssh-host 13.37.13.37
+
+   Now your users will notice the migration and will not be able to send
+   or receive messages until the migration is completed.
+
+2. Now we want to copy ``/home/vmail``, ``/var/lib/acme``,
+   ``/etc/dkimkeys``, ``/run/echobot``, and ``/var/spool/postfix`` to
+   the new site. Login to the old site while forwarding your SSH agent
+   so you can copy directly from the old to the new site with your SSH
+   key:
+
+   ::
+
+       ssh -A root@13.37.13.37
+       tar c - /home/vmail/mail /var/lib/acme /etc/dkimkeys /run/echobot /var/spool/postfix | ssh root@13.12.23.42 "tar x -C /"
+
+   This transfers all addresses, the TLS certificate, DKIM keys (so DKIM
+   DNS record remains valid), and the echobot’s password so it continues
+   to function. It also preserves the Postfix mail spool so any messages
+   pending delivery will still be delivered.
+
+3. Install chatmail on the new machine:
+
+   ::
+
+       cmdeploy run --disable-mail --ssh-host 13.12.23.42
+
+   Postfix and Dovecot are disabled for now; we will enable them later.
+   We first need to make the new site fully operational.
+
+4. On the new site, run the following to ensure the ownership is correct
+   in case UIDs/GIDs changed:
+
+   ::
+
+       chown root: -R /var/lib/acme
+       chown opendkim: -R /etc/dkimkeys
+       chown vmail: -R /home/vmail/mail
+       chown echobot: -R /run/echobot
+
+5. Now, update DNS entries.
+
+   If other MTAs try to deliver messages to your chatmail domain they
+   may fail intermittently, as DNS catches up with the new site settings
+   but normally will retry delivering messages for at least a week, so
+   messages will not be lost.
+
+6. Finally, you can execute ``cmdeploy run --ssh-host 13.12.23.42`` to
+   turn on chatmail on the new relay. Your users will be able to use the
+   chatmail relay as soon as the DNS changes have propagated. Voilà!
+

doc/source/overview.rst

@@ -0,0 +1,410 @@
+
+Technical overview
+======================
+
+
+Directories of the relay repository
+-----------------------------------
+
+The `chatmail relay repository <https://github.com/chatmail/relay/tree/main/>`_
+has four main directories.
+
+``scripts/``
+~~~~~~~~~~~~~
+
+`scripts <https://github.com/chatmail/relay/tree/main/scripts>`_
+offers two convenience tools for beginners:
+
+- ``initenv.sh`` installs a local virtualenv Python environment and
+  installs necessary dependencies
+
+- ``scripts/cmdeploy`` script enables you to run the ``cmdeploy``
+  command line tool in the local Python virtual environment.
+
+
+``cmdeploy/``
+~~~~~~~~~~~~~
+
+The ``cmdeploy`` directory contains the Python package and command line tool
+to setup a chatmail relay remotely via SSH:
+
+- ``cmdeploy init`` creates the ``chatmail.ini`` config file locally.
+
+- ``cmdeploy run`` under the hood uses pyinfra_
+  to automatically install or upgrade all chatmail components on a relay,
+  according to the local ``chatmail.ini`` config.
+
+The deployed system components of a chatmail relay are:
+
+-  Postfix_ is the Mail Transport Agent (MTA) and
+   accepts messages from, and sends messages to, the wider email MTA network
+
+-  Dovecot_ is the Mail Delivery Agent (MDA) and
+   stores messages for users until they download them
+
+-  Nginx_ shows the web page with privacy policy and additional information
+
+-  `acmetool <https://hlandau.github.io/acmetool/>`_ manages TLS
+   certificates for Dovecot, Postfix, and Nginx
+
+-  `OpenDKIM <http://www.opendkim.org/>`_ for signing messages with
+   DKIM and rejecting inbound messages without DKIM
+
+-  `mtail <https://google.github.io/mtail/>`_ for collecting anonymized
+   metrics in case you have monitoring
+
+-  `Iroh relay <https://www.iroh.computer/docs/concepts/relay>`_ which
+   helps client devices to establish Peer-to-Peer connections
+
+-  `TURN <https://github.com/chatmail/chatmail-turn>`_ to enable relay
+   users to start webRTC calls even if a p2p connection can’t be
+   established
+
+-  and the chatmaild services, explained in the next section:
+
+
+``chatmaild/``
+~~~~~~~~~~~~~~
+
+`chatmaild <https://github.com/chatmail/relay/tree/main/chatmaild>`_
+is a Python package containing several small services which handle
+authentication, trigger push notifications on new messages, ensure
+that outbound mails are encrypted, delete inactive users, and some
+other minor things. chatmaild can also be installed as a stand-alone
+Python package.
+
+``chatmaild`` implements various systemd-controlled services
+that integrate with Dovecot and Postfix to achieve instant-onboarding
+and only relaying OpenPGP end-to-end messages encrypted messages. A
+short overview of ``chatmaild`` services:
+
+-  `doveauth <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/doveauth.py>`_
+   implements create-on-login address semantics and is used by Dovecot
+   during IMAP login and by Postfix during SMTP/SUBMISSION login which
+   in turn uses `Dovecot SASL
+   <https://doc.dovecot.org/2.3/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket>`_
+   to authenticate logins.
+
+-  `filtermail <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/filtermail.py>`_
+   prevents unencrypted email from leaving or entering the chatmail
+   service and is integrated into Postfix’s outbound and inbound mail
+   pipelines.
+
+-  `chatmail-metadata <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/metadata.py>`_
+   is contacted by a `Dovecot lua
+   script <https://github.com/chatmail/relay/blob/main/cmdeploy/src/cmdeploy/dovecot/push_notification.lua>`_
+   to store user-specific relay-side config. On new messages, it `passes
+   the user’s push notification
+   token <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/notifier.py>`_
+   to
+   `notifications.delta.chat <https://delta.chat/en/help#instant-delivery>`_
+   so the push notifications on the user’s phone can be triggered by
+   Apple/Google/Huawei.
+
+-  `chatmail-expire <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/expire.py>`_
+   deletes users if they have not logged in for a longer while.
+   The timeframe can be configured in ``chatmail.ini``.
+
+-  `lastlogin <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/lastlogin.py>`_
+   is contacted by Dovecot when a user logs in and stores the date of
+   the login.
+
+-  `echobot <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/echo.py>`_
+   is a small bot for test purposes. It simply echoes back messages from
+   users.
+
+-  `metrics <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/metrics.py>`_
+   collects some metrics and displays them at
+   ``https://example.org/metrics``.
+
+``www/``
+~~~~~~~~~
+
+`www <https://github.com/chatmail/relay/tree/main/www>`_ contains
+the html, css, and markdown files which make up a chatmail relay’s
+web page. Edit them before deploying to make your chatmail relay
+stand out.
+
+
+Chatmail relay dependency diagram
+---------------------------------
+
+.. mermaid::
+   :caption: This diagram shows relay components and dependencies/communication paths.
+
+    graph LR;
+        letsencrypt --- |80|acmetool-redirector;
+        acmetool-redirector --- |443|nginx-right(["`nginx
+        (external)`"]);
+        nginx-external --- |465|postfix;
+        nginx-external(["`nginx
+        (external)`"]) --- |8443|nginx-internal["`nginx
+        (internal)`"];
+        nginx-internal --- website["`Website
+        /var/www/html`"];
+        nginx-internal --- newemail.py;
+        nginx-internal --- autoconfig.xml;
+        certs-nginx[("`TLS certs
+        /var/lib/acme`")] --> nginx-internal;
+        systemd-timer --- chatmail-metrics;
+        systemd-timer --- acmetool;
+        systemd-timer --- chatmail-expire-daily;
+        systemd-timer --- chatmail-fsreport-daily;
+        chatmail-metrics --- website;
+        acmetool --> certs[("`TLS certs
+        /var/lib/acme`")];
+        nginx-external --- |993|dovecot;
+        postfix --- |SASL|dovecot;
+        autoconfig.xml --- postfix;
+        autoconfig.xml --- dovecot;
+        postfix --- |10080|filtermail-outgoing;
+        postfix --- |10081|filtermail-incoming;
+        filtermail-outgoing --- |10025 reinject|postfix;
+        filtermail-incoming --- |10026 reinject|postfix;
+        dovecot --- |doveauth.socket|doveauth;
+        dovecot --- |message delivery|maildir["maildir
+        /home/vmail/.../user"];
+        dovecot --- |lastlogin.socket|lastlogin;
+        dovecot --- chatmail-metadata;
+        lastlogin --- maildir;
+        doveauth --- maildir;
+        chatmail-expire-daily --- maildir;
+        chatmail-fsreport-daily --- maildir;
+        chatmail-metadata --- iroh-relay;
+        chatmail-metadata --- |encrypted device token| notifications.delta.chat;
+        certs-nginx --> postfix;
+        certs-nginx --> dovecot;
+        style certs fill:#ff6;
+        style website fill:#ff6;
+        style maildir fill:#ff6;
+        style certs-nginx fill:#ff6;
+        style nginx-external fill:#f66;
+        style nginx-right fill:#f66;
+        style postfix fill:#f66;
+        style dovecot fill:#f66;
+        style notification-proxy fill:#f66;
+
+Message between users on the same relay
+---------------------------------------
+
+.. mermaid::
+    :caption: This diagram shows the path a non-federated message takes.
+
+    graph LR;
+        sender --> |465|smtps/smtpd;
+        sender --> |587|submission/smtpd;
+        smtps/smtpd --> |10080|filtermail;
+        submission/smtpd --> |10080|filtermail;
+        filtermail --> |10025|smtpd_reinject;
+        smtpd_reinject --> cleanup;
+        cleanup --> qmgr;
+        qmgr --> smtpd_accepts_message;
+        qmgr --> |lmtp|dovecot;
+        dovecot --> recipient;
+        dovecot --> sender's_other_devices;
+
+Message to an external address
+------------------------------
+
+.. mermaid::
+    :caption: This diagram shows the path a federated message takes.
+
+    graph LR;
+        sender --> |465|smtps/smtpd;
+        sender --> |587|submission/smtpd;
+        smtps/smtpd --> |10080|filtermail;
+        submission/smtpd --> |10080|filtermail;
+        filtermail --> |10025|smtpd_reinject;
+        smtpd_reinject --> opendkim;
+        opendkim --> smtpd_reinject;
+        smtpd_reinject --> cleanup;
+        cleanup --> qmgr;
+        qmgr --> external_smtp_server;
+        qmgr --> |lmtp|dovecot;
+        external_smtp_server --> recipient;
+        dovecot --> senders_other_devices;
+
+Message from an external address
+--------------------------------
+
+.. mermaid::
+    :caption: This diagram shows the path a federated message takes.
+
+    graph LR;
+        external_smtp_server --> |25|smtpd;
+        smtps/smtpd --> |10081|filtermail-incoming;
+        filtermail-incoming --> |10026|smtpd_reinject_incoming;
+        smtpd_reinject_incoming --> opendkim;
+        opendkim --> smtpd_reinject_incoming;
+        smtpd_reinject_incoming --> cleanup;
+        cleanup --> qmgr;
+        qmgr --> |lmtp|dovecot;
+        dovecot --> recipient;
+
+Operational details of a chatmail relay
+----------------------------------------
+
+Mailbox directory layout
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+Fresh chatmail addresses have a mailbox directory that contains:
+
+-  a ``password`` file with the salted password required for
+   authenticating whether a login may use the address to send/receive
+   messages. If you modify the password file manually, you effectively
+   block the user.
+
+-  ``enforceE2EEincoming`` is a default-created file with each address.
+   If present the file indicates that this chatmail address rejects
+   incoming cleartext messages. If absent the address accepts incoming
+   cleartext messages.
+
+-  ``dovecot*``, ``cur``, ``new`` and ``tmp`` represent IMAP/mailbox
+   state. If the address is only used by one device, the Maildir
+   directories will typically be empty unless the user of that address
+   hasn’t been online for a while.
+
+Active ports
+~~~~~~~~~~~~
+
+Postfix_ listens on ports
+
+- 25 (SMTP)
+
+- 587 (SUBMISSION) and
+
+- 465 (SUBMISSIONS)
+
+Dovecot_ listens on ports
+
+- 143 (IMAP) and
+
+- 993 (IMAPS)
+
+Nginx_ listens on port
+
+- 8443 (HTTPS-ALT) and
+
+- 443 (HTTPS) which multiplexes HTTPS, IMAP and SMTP using ALPN
+  to redirect connections to ports 8443, 465 or 993.
+
+`acmetool <https://hlandau.github.io/acmetool/>`_ listens on port:
+
+- 80 (HTTP).
+
+`chatmail-turn <https://github.com/chatmail/chatmail-turn>`_ listens on port
+
+- 3478 UDP (STUN/TURN), and temporarily opens further UDP ports
+  when users request them. UDP port range is not restricted, any free port
+  may be allocated.
+
+chatmail-core based apps will, however, discover all ports and
+configurations automatically by reading the `autoconfig XML
+file <https://www.ietf.org/archive/id/draft-bucksch-autoconfig-00.html>`_
+from the chatmail relay server.
+
+Email domain authentication (DKIM)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Chatmail relays enforce :rfc:`DKIM <6376>` to authenticate incoming emails.
+Incoming emails must have a valid DKIM signature with
+Signing Domain Identifier (SDID, ``d=`` parameter in the DKIM-Signature
+header) equal to the ``From:`` header domain. This property is checked
+by OpenDKIM screen policy script before validating the signatures. This
+correpsonds to strict :rfc:`DMARC <7489>` alignment (``adkim=s``).
+If there is no valid DKIM signature on the incoming email, the
+sender receives a “5.7.1 No valid DKIM signature found” error.
+
+Note that chatmail relays
+
+- do **not** rely on DMARC and do not consult the sender policy published in DMARC records;
+
+- do **not** rely on legacy authentication mechanisms such as
+  :rfc:`iprev <8601#section-2.7.3>` and :rfc:`SPF <7208>`.
+  Any IP address is accepted if the DKIM signature was valid.
+
+Outgoing emails must be sent over authenticated connection with envelope
+``MAIL FROM`` (return path) corresponding to the login.
+This is ensured by Postfix which maps login username to ``MAIL FROM`` with
+`smtpd_sender_login_maps <https://www.postfix.org/postconf.5.html#smtpd_sender_login_maps>`_
+and rejects incorrectly authenticated emails with
+`reject_sender_login_mismatch <https://www.postfix.org/postconf.5.html#reject_sender_login_mismatch>`_ policy.
+``From:`` header must correspond to envelope ``MAIL FROM``, this is
+ensured by ``filtermail`` proxy.
+
+TLS requirements
+~~~~~~~~~~~~~~~~
+
+Postfix is configured to require valid TLS by setting
+`smtp_tls_security_level <https://www.postfix.org/postconf.5.html#smtp_tls_security_level>`_
+to ``verify``. If emails don’t arrive at your chatmail relay server, the
+problem is likely that your relay does not have a valid TLS certificate.
+
+You can test it by resolving ``MX`` records of your relay domain and
+then connecting to MX relays (e.g ``mx.example.org``) with
+``openssl s_client -connect mx.example.org:25 -verify_hostname mx.example.org -verify_return_error -starttls smtp``
+from the host that has open port 25 to verify that certificate is valid.
+
+When providing a TLS certificate to your chatmail relay server, make
+sure to provide the full certificate chain and not just the last
+certificate.
+
+If you are running an Exim server and don’t see incoming connections
+from a chatmail relay server in the logs, make sure ``smtp_no_mail`` log
+item is enabled in the config with ``log_selector = +smtp_no_mail``. By
+default Exim does not log sessions that are closed before sending the
+``MAIL`` command. This happens if certificate is not recognized as valid
+by Postfix, so you might think that connection is not established while
+actually it is a problem with your TLS certificate.
+
+
+.. _dovecot: https://dovecot.org
+.. _postfix: https://www.postfix.org
+.. _nginx: https://nginx.org
+.. _pyinfra: https://pyinfra.com
+
+
+Architecture of cmdeploy
+------------------------
+
+cmdeploy is a Python program that uses the pyinfra library to deploy
+chatmail relays, with all the necessary software, configuration, and
+services.  The deployment process performs three primary types of
+operation:
+
+1. Installation of software, universal across all deployments.
+2. Configuration of software, with deploy-specific variations.
+3. Activation of services.
+
+The process is implemented through a family of "deployer" objects
+which all derive from a common ``Deployer`` base class, defined in
+cmdeploy/src/cmdeploy/deployer.py.  Each object provides
+implementation methods for the three stages -- install, configure, and
+activate.  The top-level procedure in ``deploy_chatmail()`` calls
+these methods for all the deployer objects, via the
+``Deployment.perform_stages()`` method, also defined in deployer.py.
+This first calls all the install methods, then the configure methods,
+then the activate methods.
+
+The ``Deployment`` class also implements support for a CMDEPLOY_STAGES
+environment variable, which allows limiting the process to specific
+stages.  Note that some deployers are stateful between the stages
+(this is one reason why they are implemented as objects), and that
+state will not get propagated between stages when run in separate
+invocations of cmdeploy.  This environment variable is intended for
+use in future revisions to support building Docker images with
+software pre-installed, and configuration of containers at run time
+from environment variables.
+
+The, ``install()`` methods for the deployer classes should use 'self'
+as little as possible, preferably not at all.  In particular,
+``install()`` methods should never depend on "config" data, such as
+the config dictionary in ``self.config`` or specific values like
+``self.mail_domain``.  This ensures that these methods can be used to
+perform generic installation operations that are applicable across
+multiple relay deployments, and therefore can be called in the process
+of building a general-purpose container image.
+
+Operations that start services for systemd-based deployments should
+only be called from the ``activate_impl()`` methods.  These methods
+will not be called in non-systemd container environments.

doc/source/proxy.rst

@@ -0,0 +1,114 @@
+
+Setting up a reverse proxy
+--------------------------
+
+A chatmail relay MTA does not track or depend on the client IP address
+for its operation, so it can be run behind a reverse proxy. This will
+not even affect incoming mail authentication as DKIM only checks the
+cryptographic signature of the message and does not use the IP address
+as the input.
+
+For example, you may want to self-host your chatmail relay and only use
+hosted VPS to provide a public IP address for client connections and
+incoming mail. You can connect chatmail relay to VPS using a tunnel
+protocol such as `WireGuard <https://www.wireguard.com/>`_ and setup a
+reverse proxy on a VPS to forward connections to the chatmail relay over
+the tunnel. You can also setup multiple reverse proxies for your
+chatmail relay in different networks to ensure your relay is reachable
+even when one of the IPs becomes inaccessible due to hosting or routing
+problems.
+
+Note that your chatmail relay still needs to be able to make outgoing
+connections on port 25 to send messages outside.
+
+To setup a reverse proxy (or rather Destination NAT, DNAT) for your
+chatmail relay, put the following configuration in
+``/etc/nftables.conf``:
+
+::
+
+   #!/usr/sbin/nft -f
+
+   flush ruleset
+
+   define wan = eth0
+
+   # Which ports to proxy.
+   #
+   # Note that SSH is not proxied
+   # so it is possible to log into the proxy server
+   # and not the original one.
+   define ports = { smtp, http, https, imap, imaps, submission, submissions }
+
+   # The host we want to proxy to.
+   define ipv4_address = AAA.BBB.CCC.DDD
+   define ipv6_address = [XXX::1]
+
+   table ip nat {
+           chain prerouting {
+                   type nat hook prerouting priority dstnat; policy accept;
+                   iif $wan tcp dport $ports dnat to $ipv4_address
+           }
+
+           chain postrouting {
+                   type nat hook postrouting priority 0;
+
+                   oifname $wan masquerade
+           }
+   }
+
+   table ip6 nat {
+           chain prerouting {
+                   type nat hook prerouting priority dstnat; policy accept;
+                   iif $wan tcp dport $ports dnat to $ipv6_address
+           }
+
+           chain postrouting {
+                   type nat hook postrouting priority 0;
+
+                   oifname $wan masquerade
+           }
+   }
+
+   table inet filter {
+           chain input {
+                   type filter hook input priority filter; policy drop;
+
+                   # Accept ICMP.
+                   # It is especially important to accept ICMPv6 ND messages,
+                   # otherwise IPv6 connectivity breaks.
+                   icmp type { echo-request } accept
+                   icmpv6 type { echo-request, nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert } accept
+
+                   # Allow incoming SSH connections.
+                   tcp dport { ssh } accept
+
+                   ct state established accept
+           }
+           chain forward {
+                   type filter hook forward priority filter; policy drop;
+
+                   ct state established accept
+                   ip daddr $ipv4_address counter accept
+                   ip6 daddr $ipv6_address counter accept
+           }
+           chain output {
+                   type filter hook output priority filter;
+           }
+   }
+
+Run ``systemctl enable nftables.service`` to ensure configuration is
+reloaded when the proxy relay reboots.
+
+Uncomment in ``/etc/sysctl.conf`` the following two lines:
+
+::
+
+   net.ipv4.ip_forward=1
+   net.ipv6.conf.all.forwarding=1
+
+Then reboot the relay or do ``sysctl -p`` and
+``nft -f /etc/nftables.conf``.
+
+Once proxy relay is set up, you can add its IP address to the DNS.
+

doc/source/related.rst

@@ -0,0 +1,20 @@
+
+Community developments
+======================
+
+Active development takes place in the `chatmail/relay github repository <https://github.com/chatmail/relay>`_.
+
+You can check out the `'chatmail' tag in the support.delta.chat forum <https://support.delta.chat/tag/chatmail>`_
+and ask to get added to a non-public support chat for debugging issues.
+
+We know of two work-in-progress alternative implementation efforts:
+
+-  `Mox <https://github.com/mjl-/mox>`_: A Golang email server. `Work
+   is in progress <https://github.com/mjl-/mox/issues/251>`_ to modify
+   it to support all of the features and configuration settings required
+   to operate as a chatmail relay.
+
+-  `Maddy-Chatmail <https://github.com/sadraiiali/maddy_chatmail>`_: a
+   plugin for the `Maddy email server <https://maddy.email/>`_ which
+   aims to implement the chatmail relay features and configuration
+   options.