feat: add CI for docker

Docker and Compose support is provided through a standalone repo at https://github.com/chatmail/docker, add reusable Docker build/test CI jobs to staging workflows and a Docker docs stub pointing to the chatmail/docker repository. Requires CHATMAIL_DOCKER_DISPATCH_TOKEN secret in relay repo settings (fine-grained PAT with contents:write on chatmail/docker).
2026-05-10 16:04:37 +00:00 · 2026-04-15 16:35:14 +02:00
42 changed files with 503 additions and 677 deletions
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,35 +1,21 @@
-name: Run unit-tests and container-based deploy+test verification
+name: CI

 on:
-  # Triggers when a PR is merged into main or a direct push occurs
-  push:
-    branches: [ "main" ]
-    
-  # Triggers for any PR (and its subsequent commits) targeting the main branch
  pull_request:
-    branches: [ "main" ]
-
-permissions: {}
-
-# Newest push wins: Prevents multiple runs from clashing and wasting runner efforts
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
-
+  push:

 jobs:
  tox:
    name: isolated chatmaild tests
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
+      - 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 }}
-          persist-credentials: false
      - name: download filtermail
-        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.6.4/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
+        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.6.1/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
      - name: run chatmaild tests 
        working-directory: chatmaild
        run: pipx run tox
@@ -38,10 +24,7 @@ jobs:
    name: deploy-chatmail tests 
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          persist-credentials: false
+      - uses: actions/checkout@v4

      - name: initenv 
        run: scripts/initenv.sh
@@ -55,23 +38,5 @@ jobs:
      - name: run deploy-chatmail offline tests 
        run: pytest --pyargs cmdeploy 

-  lxc-test:
-    name: LXC deploy and test
-    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@v0.10.0
-    with:
-      cmlxc_commands: |
-        cmlxc init 
-        # single cmdeploy relay test
-        cmlxc -v deploy-cmdeploy --source ./repo cm0
-        cmlxc -v test-mini cm0
-        cmlxc -v test-cmdeploy cm0
-
-        # cross cmdeploy relay test
-        cmlxc -v deploy-cmdeploy --source ./repo --ipv4-only cm1
-        cmlxc -v test-cmdeploy cm0 cm1
-
-        # cross cmdeploy/madmail relay tests
-        cmlxc -v deploy-madmail mad0
-        cmlxc -v test-cmdeploy cm0 mad0
-        cmlxc -v test-mini cm0 mad0
-        cmlxc -v test-mini mad0 cm0
+      # all other cmdeploy commands require a staging server 
+      # see https://github.com/deltachat/chatmail/issues/100
--- a/.github/workflows/docker-deploy.yaml
+++ b/.github/workflows/docker-deploy.yaml
@@ -0,0 +1,125 @@
+name: Docker deploy
+
+on:
+  workflow_call:
+    inputs:
+      staging_host:
+        required: true
+        type: string
+        description: 'SSH hostname (e.g. staging2.testrun.org)'
+      mail_domain:
+        required: true
+        type: string
+        description: 'MAIL_DOMAIN for docker compose'
+      zone_file:
+        required: true
+        type: string
+        description: 'Default zone file basename (e.g. staging.testrun.org-default.zone)'
+
+jobs:
+  deploy-docker:
+    name: Docker deploy on ${{ inputs.staging_host }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    environment:
+      name: ${{ inputs.staging_host }}
+      url: https://${{ inputs.staging_host }}/
+    concurrency: ${{ inputs.staging_host }}
+    env:
+      VPS: root@${{ inputs.staging_host }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Setup SSH
+        run: |
+          mkdir ~/.ssh
+          echo "${{ secrets.STAGING_SSH_KEY }}" >> ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan ${{ inputs.staging_host }} > ~/.ssh/known_hosts
+          # Reuse TCP connection for all subsequent ssh/scp calls
+          echo -e "Host ${{ inputs.staging_host }}\n  ControlMaster auto\n  ControlPath ~/.ssh/ctrl-%r@%h:%p\n  ControlPersist 10m" >> ~/.ssh/config
+
+      - name: stop bare services, install Docker, prepare mounts
+        run: |
+          ssh $VPS bash -s <<'EOF'
+          systemctl stop postfix dovecot nginx opendkim unbound filtermail doveauth chatmail-metadata iroh-relay mtail fcgiwrap acmetool 2>/dev/null || true
+          curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc && chmod a+r /etc/apt/keyrings/docker.asc
+          echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $(. /etc/os-release && echo $VERSION_CODENAME) stable" > /etc/apt/sources.list.d/docker.list
+          apt-get update
+          apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
+          mkdir -p /srv/chatmail/certs /srv/chatmail/dkim
+          cp -a /var/lib/acme/. /srv/chatmail/certs/ || true
+          cp -a /etc/dkimkeys/. /srv/chatmail/dkim/ || true
+          cp /etc/chatmail/chatmail.ini /srv/chatmail/chatmail.ini
+          EOF
+
+      - name: deploy with Docker
+        run: |
+          SHORT_SHA=$(echo "${{ github.sha }}" | cut -c1-7)
+          GHCR_IMAGE="ghcr.io/chatmail/docker:sha-${SHORT_SHA}"
+          rsync -avz --exclude='.git' --exclude='venv' --exclude='__pycache__' ./ $VPS:/srv/chatmail/relay/
+          echo "${{ secrets.GITHUB_TOKEN }}" | ssh $VPS "docker login ghcr.io -u ${{ github.actor }} --password-stdin && \
+            docker pull ${GHCR_IMAGE} && \
+            cd /srv/chatmail/relay && CHATMAIL_IMAGE=${GHCR_IMAGE} MAIL_DOMAIN=${{ inputs.mail_domain }} docker compose -f docker/docker-compose.yaml -f docker/docker-compose.ci.yaml up -d"
+
+      - name: wait for container healthy
+        run: |
+          ssh $VPS 'docker exec chatmail journalctl -f --no-pager' &
+          LOG_PID=$!
+          trap "kill $LOG_PID 2>/dev/null || true" EXIT
+          for i in $(seq 1 60); do
+            status=$(ssh $VPS 'docker inspect --format={{.State.Health.Status}} chatmail 2>/dev/null' || echo "missing")
+            echo "  [$i/60] status=$status"
+            if [ "$status" = "healthy" ]; then
+              echo "Container is healthy."
+              exit 0
+            fi
+            if [ "$status" = "unhealthy" ]; then
+              echo "Container is unhealthy!"
+              break
+            fi
+            sleep 5
+          done
+          echo "Container did not become healthy."
+          kill $LOG_PID 2>/dev/null || true
+          ssh $VPS bash -s <<'EOF'
+          echo "--- failed units ---"
+          docker exec chatmail systemctl --failed --no-pager || true
+          echo "--- service logs ---"
+          docker exec chatmail journalctl -u dovecot -u postfix -u nginx -u unbound --no-pager -n 50 || true
+          echo "--- listening ports ---"
+          docker exec chatmail ss -tlnp || true
+          echo "--- chatmail.ini ---"
+          docker exec chatmail cat /etc/chatmail/chatmail.ini || true
+          EOF
+          exit 1
+
+      - name: show container state
+        run: |
+          ssh $VPS bash -s <<'EOF'
+          echo "--- listening ports ---"
+          docker exec chatmail ss -tlnp
+          echo "--- chatmail.ini ---"
+          docker exec chatmail cat /etc/chatmail/chatmail.ini
+          EOF
+
+      - name: Docker integration tests
+        run: ssh $VPS 'docker exec chatmail cmdeploy test --slow --ssh-host @local'
+
+      - name: Docker DNS
+        run: |
+          git checkout .github/workflows/${{ inputs.zone_file }}
+          ssh $VPS bash -s <<'EOF'
+          docker exec chatmail chown opendkim:opendkim -R /etc/dkimkeys
+          docker exec chatmail cmdeploy dns --ssh-host @local --zonefile /opt/chatmail/staging.zone --verbose
+          docker cp chatmail:/opt/chatmail/staging.zone /tmp/staging.zone
+          EOF
+          scp $VPS:/tmp/staging.zone staging-generated.zone
+          cat staging-generated.zone >> .github/workflows/${{ inputs.zone_file }}
+          cat .github/workflows/${{ inputs.zone_file }}
+          scp .github/workflows/${{ inputs.zone_file }} root@ns.testrun.org:/etc/nsd/${{ inputs.staging_host }}.zone
+          ssh root@ns.testrun.org "nsd-checkzone ${{ inputs.staging_host }} /etc/nsd/${{ inputs.staging_host }}.zone && systemctl reload nsd"
+
+      - name: Docker final DNS check
+        run: ssh $VPS 'docker exec chatmail cmdeploy dns -v --ssh-host @local'
--- a/.github/workflows/docker-dispatch.yaml
+++ b/.github/workflows/docker-dispatch.yaml
@@ -1,37 +0,0 @@
-# Notify the docker repo to build and test a new image after relay CI passes.
-#
-# Sends a repository_dispatch event to chatmail/docker with the relay ref
-# and short SHA, which triggers docker-ci.yaml to build, push to GHCR,
-# and run integration tests via cmlxc.
-
-name: Trigger Docker build
-
-on:
-  push:
-    branches: [main]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  dispatch:
-    name: Dispatch build to chatmail/docker
-    runs-on: ubuntu-latest
-    if: github.repository == 'chatmail/relay'
-    steps:
-      - name: Compute short SHA
-        id: sha
-        run: echo "short=$(echo '${{ github.sha }}' | cut -c1-7)" >> "$GITHUB_OUTPUT"
-
-      - name: Send repository_dispatch
-        uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0 # v3
-        with:
-          token: ${{ secrets.CHATMAIL_DOCKER_DISPATCH_TOKEN }}
-          repository: chatmail/docker
-          event-type: relay-updated
-          client-payload: >-
-            {
-              "relay_ref": "${{ github.ref_name }}",
-              "relay_sha": "${{ github.sha }}",
-              "relay_sha_short": "${{ steps.sha.outputs.short }}"
-            }
--- a/.github/workflows/docs-preview.yaml
+++ b/.github/workflows/docs-preview.yaml
@@ -7,8 +7,6 @@ on:
      - 'scripts/build-docs.sh'
      - '.github/workflows/docs-preview.yaml'

-permissions: {}
-
 jobs:
  scripts:
    name: build 
@@ -18,8 +16,6 @@ jobs:
      url: https://staging.chatmail.at/doc/relay/${{ steps.prepare.outputs.prid }}
    steps:
      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false

      - name: initenv 
        run: scripts/initenv.sh
@@ -38,22 +34,18 @@ jobs:
      - name: Get Pullrequest ID
        id: prepare
        run: |
-          export PULLREQUEST_ID=$(echo "${GITHUB_REF}" | cut -d "/" -f3)
+          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
-        env:
-          STEPS_PREPARE_OUTPUTS_PRID: ${{ steps.prepare.outputs.prid }}
+          echo "baseurl: /${{ 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}/"
-        env:
-          STEPS_PREPARE_OUTPUTS_PRID: ${{ steps.prepare.outputs.prid }}
+          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: check links 
        working-directory: doc
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -10,8 +10,6 @@ on:
      - 'scripts/build-docs.sh'
      - '.github/workflows/docs.yaml'

-permissions: {}
-
 jobs:
  scripts:
    name: build 
@@ -21,8 +19,6 @@ jobs:
      url: https://chatmail.at/doc/relay/
    steps:
      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false

      - name: initenv 
        run: scripts/initenv.sh
--- a/.github/workflows/test-and-deploy-ipv4only.yaml
+++ b/.github/workflows/test-and-deploy-ipv4only.yaml
@@ -0,0 +1,121 @@
+name: deploy on staging-ipv4.testrun.org, and run tests
+
+on:
+  push:
+    branches:
+      - main
+      - j4n/docker-pr
+  pull_request:
+    paths-ignore:
+      - 'scripts/**'
+      - '**/README.md'
+      - 'CHANGELOG.md'
+      - 'LICENSE'
+
+jobs:
+  trigger-docker-build:
+    if: github.event_name == 'push'
+    uses: ./.github/workflows/trigger-docker-build.yaml
+    secrets: inherit
+
+  deploy:
+    name: deploy on staging-ipv4.testrun.org, and run tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    environment:
+      name: staging-ipv4.testrun.org
+      url: https://staging-ipv4.testrun.org/
+    concurrency: staging-ipv4.testrun.org
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: prepare SSH
+        run: |
+          mkdir ~/.ssh
+          echo "${{ secrets.STAGING_SSH_KEY }}" >> ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan staging-ipv4.testrun.org > ~/.ssh/known_hosts
+          # save previous acme & dkim state
+          rsync -avz root@staging-ipv4.testrun.org:/var/lib/acme acme-ipv4 || true
+          rsync -avz root@staging-ipv4.testrun.org:/etc/dkimkeys dkimkeys-ipv4 || true
+          # store previous acme & dkim state on ns.testrun.org, if it contains useful certs
+          if [ -f dkimkeys-ipv4/dkimkeys/opendkim.private ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" dkimkeys-ipv4 root@ns.testrun.org:/tmp/ || true; fi
+          if [ "$(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 -o StrictHostKeyChecking=accept-new .github/workflows/staging-ipv4.testrun.org-default.zone root@ns.testrun.org:/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
+
+      - name: rebuild staging-ipv4.testrun.org to have a clean VPS
+        run: |
+            curl -X POST \
+            -H "Authorization: Bearer ${{ secrets.HETZNER_API_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d '{"image":"debian-12"}' \
+            "https://api.hetzner.cloud/v1/servers/${{ secrets.STAGING_IPV4_SERVER_ID }}/actions/rebuild"
+
+      - run: scripts/initenv.sh
+
+      - name: append venv/bin to PATH
+        run: echo venv/bin >>$GITHUB_PATH
+
+      - name: upload TLS cert after rebuilding
+        run: |
+          echo " --- wait until staging-ipv4.testrun.org VPS is rebuilt --- "
+          rm ~/.ssh/known_hosts
+          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 acme-restore || true
+          rsync -avz root@ns.testrun.org:/tmp/dkimkeys-ipv4/dkimkeys dkimkeys-restore || true
+          # restore acme & dkim state to staging-ipv4.testrun.org
+          rsync -avz acme-restore/acme root@staging-ipv4.testrun.org:/var/lib/ || 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 deploy-chatmail offline tests
+        run: pytest --pyargs cmdeploy
+
+      - name: setup dependencies
+        run: |
+          ssh root@staging-ipv4.testrun.org apt update
+          ssh root@staging-ipv4.testrun.org apt install -y git python3.11-venv python3-dev gcc
+          ssh root@staging-ipv4.testrun.org git clone https://github.com/chatmail/relay
+          ssh root@staging-ipv4.testrun.org "cd relay && git checkout " ${{ github.head_ref }}
+          ssh root@staging-ipv4.testrun.org "cd relay && scripts/initenv.sh"
+
+      - name: initialize config
+        run: |
+          ssh root@staging-ipv4.testrun.org "cd relay && scripts/cmdeploy init staging-ipv4.testrun.org"
+          ssh root@staging-ipv4.testrun.org "sed -i 's#disable_ipv6 = False#disable_ipv6 = True#' relay/chatmail.ini"
+          ssh root@staging-ipv4.testrun.org "sed -i 's/#\s*mtail_address/mtail_address/' relay/chatmail.ini"
+
+      - run: ssh root@staging-ipv4.testrun.org "cd relay && scripts/cmdeploy run --verbose --skip-dns-check --ssh-host localhost"
+
+      - name: set DNS entries
+        run: |
+          ssh root@staging-ipv4.testrun.org "cd relay && scripts/cmdeploy dns --zonefile staging-generated.zone --ssh-host localhost"
+          ssh root@staging-ipv4.testrun.org cat relay/staging-generated.zone >> .github/workflows/staging-ipv4.testrun.org-default.zone
+          cat .github/workflows/staging-ipv4.testrun.org-default.zone
+          scp .github/workflows/staging-ipv4.testrun.org-default.zone root@ns.testrun.org:/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
+
+      - name: cmdeploy test
+        run: ssh root@staging-ipv4.testrun.org "cd relay && CHATMAIL_DOMAIN2=ci-chatmail.testrun.org scripts/cmdeploy test --slow --ssh-host localhost"
+
+      - name: cmdeploy dns
+        run: ssh root@staging-ipv4.testrun.org "cd relay && scripts/cmdeploy dns -v --ssh-host localhost"
+
+  deploy-docker:
+    needs: [deploy, trigger-docker-build]
+    if: github.event_name == 'push'
+    uses: ./.github/workflows/docker-deploy.yaml
+    with:
+      staging_host: staging-ipv4.testrun.org
+      mail_domain: staging-ipv4.testrun.org
+      zone_file: staging-ipv4.testrun.org-default.zone
+    secrets: inherit
--- a/.github/workflows/test-and-deploy.yaml
+++ b/.github/workflows/test-and-deploy.yaml
@@ -0,0 +1,112 @@
+name: deploy on staging2.testrun.org, and run tests
+
+on:
+  push:
+    branches:
+      - main
+      - j4n/docker-pr
+  pull_request:
+    paths-ignore:
+      - 'scripts/**'
+      - '**/README.md'
+      - 'CHANGELOG.md'
+      - 'LICENSE'
+
+jobs:
+  trigger-docker-build:
+    if: github.event_name == 'push'
+    uses: ./.github/workflows/trigger-docker-build.yaml
+    secrets: inherit
+
+  deploy:
+    name: deploy on staging2.testrun.org, and run tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    environment:
+      name: staging2.testrun.org
+      url: https://staging2.testrun.org/
+    concurrency: staging2.testrun.org
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: prepare SSH
+        run: |
+          mkdir ~/.ssh
+          echo "${{ secrets.STAGING_SSH_KEY }}" >> ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan staging2.testrun.org > ~/.ssh/known_hosts
+          # save previous acme & dkim state
+          rsync -avz root@staging2.testrun.org:/var/lib/acme . || true
+          rsync -avz root@staging2.testrun.org:/etc/dkimkeys . || true
+          # store previous acme & dkim state on ns.testrun.org, if it contains useful certs
+          if [ -f dkimkeys/opendkim.private ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" dkimkeys root@ns.testrun.org:/tmp/ || true; fi
+          if [ "$(ls -A acme/certs)" ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" acme root@ns.testrun.org:/tmp/ || true; fi
+          # make sure CAA record isn't set
+          scp -o StrictHostKeyChecking=accept-new .github/workflows/staging.testrun.org-default.zone root@ns.testrun.org:/etc/nsd/staging2.testrun.org.zone
+          ssh root@ns.testrun.org sed -i '/CAA/d' /etc/nsd/staging2.testrun.org.zone
+          ssh root@ns.testrun.org nsd-checkzone staging2.testrun.org /etc/nsd/staging2.testrun.org.zone
+          ssh root@ns.testrun.org systemctl reload nsd
+
+      - name: rebuild staging2.testrun.org to have a clean VPS
+        run: |
+            curl -X POST \
+            -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"
+
+      - run: scripts/initenv.sh
+
+      - name: append venv/bin to PATH
+        run: echo venv/bin >>$GITHUB_PATH
+
+      - name: upload TLS cert after rebuilding
+        run: |
+          echo " --- wait until staging2.testrun.org VPS is rebuilt --- "
+          rm ~/.ssh/known_hosts
+          while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new -v root@staging2.testrun.org id -u ; do sleep 1 ; done
+          ssh -o StrictHostKeyChecking=accept-new -v root@staging2.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 acme-restore || true
+          rsync -avz root@ns.testrun.org:/tmp/dkimkeys dkimkeys-restore || true
+          # restore acme & dkim state to staging2.testrun.org
+          rsync -avz acme-restore/acme root@staging2.testrun.org:/var/lib/ || true
+          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: add hpk42 key to staging server
+        run: ssh root@staging2.testrun.org 'curl -s https://github.com/hpk42.keys >> .ssh/authorized_keys'
+
+      - name: run deploy-chatmail offline tests 
+        run: pytest --pyargs cmdeploy 
+
+      - run: |
+          cmdeploy init staging2.testrun.org
+          sed -i 's/#\s*mtail_address/mtail_address/' chatmail.ini
+
+      - run: cmdeploy run --verbose --skip-dns-check
+
+      - name: set DNS entries
+        run: |
+          cmdeploy dns --zonefile staging-generated.zone --verbose
+          cat staging-generated.zone >> .github/workflows/staging.testrun.org-default.zone
+          cat .github/workflows/staging.testrun.org-default.zone
+          scp .github/workflows/staging.testrun.org-default.zone root@ns.testrun.org:/etc/nsd/staging2.testrun.org.zone
+          ssh root@ns.testrun.org nsd-checkzone staging2.testrun.org /etc/nsd/staging2.testrun.org.zone
+          ssh root@ns.testrun.org systemctl reload nsd
+
+      - name: cmdeploy test
+        run: CHATMAIL_DOMAIN2=ci-chatmail.testrun.org cmdeploy test --slow
+
+      - name: cmdeploy dns
+        run: cmdeploy dns -v
+
+  deploy-docker:
+    needs: [deploy, trigger-docker-build]
+    if: github.event_name == 'push'
+    uses: ./.github/workflows/docker-deploy.yaml
+    with:
+      staging_host: staging2.testrun.org
+      mail_domain: staging2.testrun.org
+      zone_file: staging.testrun.org-default.zone
+    secrets: inherit
--- a/.github/workflows/trigger-docker-build.yaml
+++ b/.github/workflows/trigger-docker-build.yaml
@@ -0,0 +1,24 @@
+name: Trigger Docker image build
+
+on:
+  workflow_call:
+
+jobs:
+  trigger-docker-build:
+    name: Trigger Docker image build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.CHATMAIL_DOCKER_DISPATCH_TOKEN }}
+          script: |
+            await github.rest.repos.createDispatchEvent({
+              owner: 'chatmail',
+              repo: 'docker',
+              event_type: 'relay-updated',
+              client_payload: {
+                relay_ref: context.ref,
+                relay_sha: context.sha,
+                relay_sha_short: context.sha.slice(0, 7)
+              }
+            })
--- a/.github/workflows/zizmor-scan.yml
+++ b/.github/workflows/zizmor-scan.yml
@@ -1,26 +0,0 @@
-name: GitHub Actions Security Analysis with zizmor
-
-on:
-  push:
-    branches: ["main"]
-  pull_request:
-    branches: ["**"]
-
-permissions: {}
-
-jobs:
-  zizmor:
-    name: Run zizmor
-    runs-on: ubuntu-latest
-    permissions:
-      security-events: write # Required for upload-sarif (used by zizmor-action) to upload SARIF files.
-      contents: read
-      actions: read
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-        with:
-          persist-credentials: false
-
-      - name: Run zizmor
-        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3
--- a/.github/zizmor.yml
+++ b/.github/zizmor.yml
@@ -1,7 +0,0 @@
-rules:
-  unpinned-uses:
-    config:
-      policies:
-        actions/*: ref-pin
-        dependabot/*: ref-pin
-        chatmail/*: ref-pin
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,89 +1,5 @@
 # Changelog for chatmail deployment 

-## 1.10.0 2026-04-30
-
-* start mtail after networking is fully up <https://github.com/chatmail/relay/pull/942>
-* support specifying custom filtermail binary through environment variable <https://github.com/chatmail/relay/pull/941>
-* add automated zizmor scanning of github workflows <https://github.com/chatmail/relay/pull/938>
-* added dispatch for *automated builds of chatmail relay docker images* <https://github.com/chatmail/relay/pull/934>
-* do not bind SMTP client sockets to public addresses <https://github.com/chatmail/relay/pull/932>
-* underline in docs that scripts/initenv.sh should be used for building the docs <https://github.com/chatmail/relay/pull/933>
-* automatic oldest-first message removal from mailboxes to always stay under max_mailbox_size <https://github.com/chatmail/relay/pull/929>
-* remove --slow from cmdeploy test <https://github.com/chatmail/relay/pull/931>
-* handle missing inotify sysctl keys in containers <https://github.com/chatmail/relay/pull/930>
-* replace resolvconf with static resolv.conf <https://github.com/chatmail/relay/pull/928>
-* disable fsync for LMTP and IMAP services <https://github.com/chatmail/relay/pull/925>
-* re-use cmlxc workflow, replacing CI with hetzner staging servers with local lxc containers <https://github.com/chatmail/relay/pull/917>
-* explicitly install resolvconf <https://github.com/chatmail/relay/pull/924>
-* detect stale dovecot binary and force restart in activate() <https://github.com/chatmail/relay/pull/922>
-* Rename filtermail_http_port to filtermail_http_port_incoming <https://github.com/chatmail/relay/pull/921>
-* consolidated is_in_container() check https://github.com/chatmail/relay/pull/920>
-* restart dovecot after package replacement (rebase, test condense) <https://github.com/chatmail/relay/pull/913>
-* Set permissions on dovecot pin prefs <https://github.com/chatmail/relay/pull/915>
-* Route `/mxdeliv/` to configurable port <https://github.com/chatmail/relay/pull/901>
-* fix VM detection, automated testing fixes, use newer chatmail-turn and move to standard BIND DNS zone format <https://github.com/chatmail/relay/pull/912>
-* Upgrade to filtermail 0.6.1 <https://github.com/chatmail/relay/pull/910>
-* pin dovecot packages to prevent apt upgrades <https://github.com/chatmail/relay/pull/908>
-* add rpc server to cmdeploy along with client <https://github.com/chatmail/relay/pull/906>
-* remove unused deps from chatmaild <https://github.com/chatmail/relay/pull/905>
-* set default smtp_tls_security_level to "verify" unconditionally <https://github.com/chatmail/relay/pull/902>
-* featprefer IPv4 in SMTP client <https://github.com/chatmail/relay/pull/900>
-* Install dovecot .deb packages atomically <https://github.com/chatmail/relay/pull/899>
-* stop installing cron package <https://github.com/chatmail/relay/pull/898>
-* Rewrite dovecot install logic, update <https://github.com/chatmail/relay/pull/862>
-* fix a test and some linting fixes <https://github.com/chatmail/relay/pull/897>
-* Disable IP verification on domain-literal addresses <https://github.com/chatmail/relay/pull/895>
-* disable installing recommended packages globally on the relay <https://github.com/chatmail/relay/pull/887>
-* multiple bug fixes across chatmaild and cmdeploy <https://github.com/chatmail/relay/pull/883>
-* remove /metrics from the website <https://github.com/chatmail/relay/pull/703>
-* add Prometheus textfile output to fsreport <https://github.com/chatmail/relay/pull/881>
-* chown opendkim: private key <https://github.com/chatmail/relay/pull/879>
-* make sure chatmail-metadata was started <https://github.com/chatmail/relay/pull/882>
-* dovecot update url <https://github.com/chatmail/relay/pull/880>
-* upgrade to filtermail v0.5.2 <https://github.com/chatmail/relay/pull/876>
-* download dovecot packages from github release <https://github.com/chatmail/relay/pull/875>
-* replace DKIM verification with filtermail v0.5 <https://github.com/chatmail/relay/pull/831>
-* remove CFFI deltachat bindings usage, and consolidate test support with rpc-bindings <https://github.com/chatmail/relay/pull/872>
-* prepare chatmaild/cmdeploy changes for Docker support <https://github.com/chatmail/relay/pull/857>
-* stabilize online benchmark timing adding rate-limit-aware cooldown between iterations <https://github.com/chatmail/relay/pull/867>
-* move rate-limit cooldown to benchmark fixture <https://github.com/chatmail/relay/pull/868>
-* reconfigure acmetool from redirector to proxy mode <https://github.com/chatmail/relay/pull/861>
-* make tests work with `--ssh-host localhost` <https://github.com/chatmail/relay/pull/856>
-* mark f-string with f prefix in test_expunged <https://github.com/chatmail/relay/pull/863>
-* install also if dovecot.service=False in SystemdEnabled Fact <https://github.com/chatmail/relay/pull/841>
-* Introduce support for self-signed chatmail relays <https://github.com/chatmail/relay/pull/855>
-* Strip Received headers before delivery <https://github.com/chatmail/relay/pull/849>
-* upgrade to filtermail v0.3 <https://github.com/chatmail/relay/pull/850>
-* fix link to Maddy and update madmail URL <https://github.com/chatmail/relay/pull/847>
-* accept self-signed certificates for IP-only relays <https://github.com/chatmail/relay/pull/846>
-* enforce sending from public IP addresses <https://github.com/chatmail/relay/pull/845>
-* port check: check addresses, fix single services <https://github.com/chatmail/relay/pull/844>
-* remediates issue with improper concat on resolver injection <https://github.com/chatmail/relay/pull/834>
-* ipv6 boolean not being respected during operations <https://github.com/chatmail/relay/pull/832>
-* upgrade to filtermail v0.2 by <https://github.com/chatmail/relay/pull/825>
-* fix link to filtermail <https://github.com/chatmail/relay/pull/824>
-* print timestamps when sending messages <https://github.com/chatmail/relay/pull/823>
-* fix flaky test_exceed_rate_limit <https://github.com/chatmail/relay/pull/822>
-* Replace filtermail with rust reimplementation <https://github.com/chatmail/relay/pull/808>
-* Set default internal SMTP ports in Config <https://github.com/chatmail/relay/pull/819>
-* separate metrics for incoming and outgoing messages <https://github.com/chatmail/relay/pull/820>
-* disable appending the Received header <https://github.com/chatmail/relay/pull/815>
-* fail on errors in postfix/dovecot config <https://github.com/chatmail/relay/pull/813>
-* tweak idle/hibernate metrics some more <https://github.com/chatmail/relay/pull/811>
-* add config flag to export statistics <https://github.com/chatmail/relay/pull/806>
-* add --website-only option to run subcommand <https://github.com/chatmail/relay/pull/768>
-* Strip DKIM-Signature header before LMTP <https://github.com/chatmail/relay/pull/803>
-* properly make sure that postfix gets restarted on failure <https://github.com/chatmail/relay/pull/802>
-* expire.py: use absolute path to maildirsize <https://github.com/chatmail/relay/pull/807>
-* pin Dovecot documentation URLs to version 2.3 <https://github.com/chatmail/relay/pull/800>
-* try to use "build machine" and "deployment server"  consistently  <https://github.com/chatmail/relay/pull/797>
-* adds instructions for migrating control machines <https://github.com/chatmail/relay/pull/795>
-* use consistent naming schema in getting started <https://github.com/chatmail/relay/pull/793>
-* remove jsok/serialize-workflow-action dependency <https://github.com/chatmail/relay/pull/790>
-* streamline migration guide wording, provide titled steps  <https://github.com/chatmail/relay/pull/789>
-* increases default max mailbox size <https://github.com/chatmail/relay/pull/792>
-* use daemon_name for OpenDKIM sign-verify decision instead of IP <https://github.com/chatmail/relay/pull/784>
-
 ## 1.9.0 2025-12-18

 ### Documentation
--- a/chatmaild/pyproject.toml
+++ b/chatmaild/pyproject.toml
@@ -21,10 +21,8 @@ where = ['src']
 [project.scripts]
 doveauth = "chatmaild.doveauth:main"
 chatmail-metadata = "chatmaild.metadata:main"
-chatmail-expire = "chatmaild.expire:daily_expire_main"
-chatmail-quota-expire = "chatmaild.expire:quota_expire_main"
+chatmail-expire = "chatmaild.expire:main"
 chatmail-fsreport = "chatmaild.fsreport:main"
-chatmail-deferred = "chatmaild.deferred:main"
 lastlogin = "chatmaild.lastlogin:main"
 turnserver = "chatmaild.turnserver:main"

--- a/chatmaild/src/chatmaild/config.py
+++ b/chatmaild/src/chatmaild/config.py
@@ -1,3 +1,4 @@
+import os
 from pathlib import Path

 import iniconfig
@@ -37,18 +38,15 @@ class Config:
        self.filtermail_smtp_port_incoming = int(
            params.get("filtermail_smtp_port_incoming", "10081")
        )
-        self.filtermail_http_port_incoming = int(
-            params.get("filtermail_http_port_incoming", "10082")
-        )
-        self.filtermail_lmtp_port_transport = int(
-            params.get("filtermail_lmtp_port_transport", "10083")
-        )
+        self.filtermail_http_port = int(params.get("filtermail_http_port", "10082"))
        self.postfix_reinject_port = int(params.get("postfix_reinject_port", "10025"))
        self.postfix_reinject_port_incoming = int(
            params.get("postfix_reinject_port_incoming", "10026")
        )
        self.mtail_address = params.get("mtail_address")
        self.disable_ipv6 = params.get("disable_ipv6", "false").lower() == "true"
+        self.addr_v4 = os.environ.get("CHATMAIL_ADDR_V4", "")
+        self.addr_v6 = os.environ.get("CHATMAIL_ADDR_V6", "")
        self.acme_email = params.get("acme_email", "")
        self.imap_rawlog = params.get("imap_rawlog", "false").lower() == "true"
        self.imap_compress = params.get("imap_compress", "false").lower() == "true"
@@ -95,11 +93,6 @@ class Config:
        # old unused option (except for first migration from sqlite to maildir store)
        self.passdb_path = Path(params.get("passdb_path", "/home/vmail/passdb.sqlite"))

-    @property
-    def max_mailbox_size_mb(self):
-        """Return max_mailbox_size as an integer in megabytes."""
-        return parse_size_mb(self.max_mailbox_size)
-
    def _getbytefile(self):
        return open(self._inipath, "rb")

@@ -113,16 +106,6 @@ class Config:
        return User(maildir, addr, password_path, uid="vmail", gid="vmail")


-def parse_size_mb(limit):
-    """Parse a size string like ``500M`` or ``2G`` and return megabytes."""
-    value = limit.strip().upper().removesuffix("B")
-    if value.endswith("G"):
-        return int(value[:-1]) * 1024
-    if value.endswith("M"):
-        return int(value[:-1])
-    return int(value)
-
-
 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)
--- a/chatmaild/src/chatmaild/deferred.py
+++ b/chatmaild/src/chatmaild/deferred.py
@@ -1,37 +0,0 @@
-"""
-Analyze deferred mails and print most common failing destinations.
-
-Example:
-
-    python -m chatmaild.deferred
-"""
-
-import json
-import subprocess
-from collections import Counter, defaultdict
-
-
-def main():
-    p = subprocess.Popen(["postqueue", "-j"], text=True, stdout=subprocess.PIPE)
-    domain_reasons = defaultdict(Counter)
-    domain_total = Counter()
-
-    for line in p.stdout:
-        item = json.loads(line)
-        if item["queue_name"] != "deferred":
-            continue
-
-        for recipient in item["recipients"]:
-            _, domain = recipient["address"].rsplit("@", 1)
-            reason = recipient["delay_reason"]
-            domain_total[domain] += 1
-            domain_reasons[domain][reason] += 1
-
-    for domain, total in reversed(domain_total.most_common()):
-        print(f"{domain} ({total} recipients)")
-        for reason, count in domain_reasons[domain].most_common():
-            print(f"  {count}: {reason}")
-
-
-if __name__ == "__main__":
-    main()
--- a/chatmaild/src/chatmaild/expire.py
+++ b/chatmaild/src/chatmaild/expire.py
@@ -4,26 +4,17 @@ Expire old messages and addresses.
 """

 import os
-import re
 import shutil
 import sys
 import time
 from argparse import ArgumentParser
 from collections import namedtuple
 from datetime import datetime
-from pathlib import Path
 from stat import S_ISREG

 from chatmaild.config import read_config

 FileEntry = namedtuple("FileEntry", ("path", "mtime", "size"))
-QuotaFileEntry = namedtuple("QuotaFileEntry", ("mtime", "quota_size", "path"))
-
-# Quota cleanup factor of max_mailbox_size. The mailbox is reset to this size.
-QUOTA_CLEANUP_FACTOR = 0.7
-
-# e.g. "cur/1775324677.M448978P3029757.exam,S=3235,W=3305:2,S"
-_dovecot_fn_rex = re.compile(r".+/(\d+)\..+,S=(\d+)")


 def iter_mailboxes(basedir, maxnum):
@@ -83,42 +74,6 @@ class MailboxStat:
        self.extrafiles.sort(key=lambda x: -x.size)


-def parse_dovecot_filename(relpath):
-    m = _dovecot_fn_rex.match(relpath)
-    if not m:
-        return None
-    return QuotaFileEntry(int(m.group(1)), int(m.group(2)), relpath)
-
-
-def scan_mailbox_messages(mbox):
-    messages = []
-    for sub in ("cur", "new"):
-        for name in os_listdir_if_exists(mbox / sub):
-            if entry := parse_dovecot_filename(f"{sub}/{name}"):
-                messages.append(entry)
-    return messages
-
-
-def expire_to_target(mbox, target_bytes):
-    messages = scan_mailbox_messages(mbox)
-    total_size = sum(m.quota_size for m in messages)
-    # Keep recent 24 hours of messages protected from expiry because
-    # likely something is wrong with interactions on that address
-    # and quota-full signal can help the address owner's device to notice it
-    undeletable_messages_cutoff = time.time() - (3600 * 24)
-    removed = 0
-    for entry in sorted(messages):
-        if total_size <= target_bytes:
-            break
-        if entry.mtime > undeletable_messages_cutoff:
-            break
-        (mbox / entry.path).unlink(missing_ok=True)
-        total_size -= entry.quota_size
-        removed += 1
-
-    return removed
-
-
 def print_info(msg):
    print(msg, file=sys.stderr)

@@ -188,19 +143,6 @@ class Expiry:
            else:
                continue
            changed = True
-
-        target_bytes = (
-            self.config.max_mailbox_size_mb * 1024 * 1024 * QUOTA_CLEANUP_FACTOR
-        )
-        removed = expire_to_target(Path(mbox.basedir), target_bytes)
-        if removed:
-            changed = True
-            self.del_files += removed
-            if self.verbose:
-                print_info(
-                    f"quota-expire: removed {removed} message(s) from {mboxname}"
-                )
-
        if changed:
            self.remove_file(f"{mbox.basedir}/maildirsize")

@@ -212,9 +154,9 @@ class Expiry:
        )


-def daily_expire_main(args=None):
+def main(args=None):
    """Expire mailboxes and messages according to chatmail config"""
-    parser = ArgumentParser(description=daily_expire_main.__doc__)
+    parser = ArgumentParser(description=main.__doc__)
    ini = "/usr/local/lib/chatmaild/chatmail.ini"
    parser.add_argument(
        "chatmail_ini",
@@ -260,33 +202,5 @@ def daily_expire_main(args=None):
    print(exp.get_summary())


-def quota_expire_main(args=None):
-    """Remove mailbox messages to stay within a megabyte target.
-
-    This entry point is called by dovecot when a quota threshold is passed.
-    """
-
-    parser = ArgumentParser(description=quota_expire_main.__doc__)
-    parser.add_argument(
-        "target_mb",
-        type=int,
-        help="target mailbox size in megabytes",
-    )
-    parser.add_argument(
-        "mailbox_path",
-        type=Path,
-        help="path to a user mailbox",
-    )
-    args = parser.parse_args(args)
-
-    target_bytes = args.target_mb * 1024 * 1024
-
-    removed_count = expire_to_target(args.mailbox_path, target_bytes)
-    if removed_count:
-        (args.mailbox_path / "maildirsize").unlink(missing_ok=True)
-        print(
-            f"quota-expire: removed {removed_count} message(s)"
-            f" from {args.mailbox_path.name}",
-            file=sys.stderr,
-        )
-    return 0
+if __name__ == "__main__":
+    main(sys.argv[1:])
--- a/chatmaild/src/chatmaild/ini/chatmail.ini.f
+++ b/chatmaild/src/chatmaild/ini/chatmail.ini.f
@@ -18,7 +18,6 @@ max_user_send_per_minute = 60
 max_user_send_burst_size = 10

 # maximum mailbox size of a chatmail address
-# Oldest messages will be removed automatically, so mailboxes never run full.
 max_mailbox_size = 500M

 # maximum message size for an e-mail in bytes
--- a/chatmaild/src/chatmaild/newemail.py
+++ b/chatmaild/src/chatmaild/newemail.py
@@ -2,7 +2,6 @@

 """CGI script for creating new accounts."""

-import ipaddress
 import json
 import secrets
 import string
@@ -15,16 +14,6 @@ ALPHANUMERIC = string.ascii_lowercase + string.digits
 ALPHANUMERIC_PUNCT = string.ascii_letters + string.digits + string.punctuation


-def wrap_ip(host):
-    if host.startswith("[") and host.endswith("]"):
-        return host
-    try:
-        ipaddress.ip_address(host)
-        return f"[{host}]"
-    except ValueError:
-        return host
-
-
 def create_newemail_dict(config: Config):
    user = "".join(
        secrets.choice(ALPHANUMERIC) for _ in range(config.username_max_length)
@@ -33,7 +22,7 @@ def create_newemail_dict(config: Config):
        secrets.choice(ALPHANUMERIC_PUNCT)
        for _ in range(config.password_min_length + 3)
    )
-    return dict(email=f"{user}@{wrap_ip(config.mail_domain)}", password=f"{password}")
+    return dict(email=f"{user}@{config.mail_domain}", password=f"{password}")


 def create_dclogin_url(email, password):
--- a/chatmaild/src/chatmaild/tests/test_config.py
+++ b/chatmaild/src/chatmaild/tests/test_config.py
@@ -1,6 +1,6 @@
 import pytest

-from chatmaild.config import parse_size_mb, read_config
+from chatmaild.config import read_config


 def test_read_config_basic(example_config):
@@ -121,17 +121,3 @@ def test_config_tls_external_bad_format(make_config):
                "tls_external_cert_and_key": "/only/one/path.pem",
            },
        )
-
-
-def test_parse_size_mb():
-    assert parse_size_mb("500M") == 500
-    assert parse_size_mb("2G") == 2048
-    assert parse_size_mb("  1g  ") == 1024
-    assert parse_size_mb("100MB") == 100
-    assert parse_size_mb("256") == 256
-
-
-def test_max_mailbox_size_mb(make_config):
-    config = make_config("chat.example.org")
-    assert config.max_mailbox_size == "500M"
-    assert config.max_mailbox_size_mb == 500
--- a/chatmaild/src/chatmaild/tests/test_delete_inactive_users.py
+++ b/chatmaild/src/chatmaild/tests/test_delete_inactive_users.py
@@ -1,7 +1,7 @@
 import time

 from chatmaild.doveauth import AuthDictProxy
-from chatmaild.expire import daily_expire_main as main_expire
+from chatmaild.expire import main as main_expire


 def test_login_timestamps(example_config):
--- a/chatmaild/src/chatmaild/tests/test_expire.py
+++ b/chatmaild/src/chatmaild/tests/test_expire.py
@@ -1,7 +1,5 @@
-import itertools
 import os
 import random
-import time
 from datetime import datetime
 from fnmatch import fnmatch
 from pathlib import Path
@@ -11,19 +9,13 @@ import pytest
 from chatmaild.expire import (
    FileEntry,
    MailboxStat,
-    expire_to_target,
    get_file_entry,
    iter_mailboxes,
    os_listdir_if_exists,
-    parse_dovecot_filename,
-    quota_expire_main,
-    scan_mailbox_messages,
 )
-from chatmaild.expire import daily_expire_main as expiry_main
+from chatmaild.expire import main as expiry_main
 from chatmaild.fsreport import main as report_main

-MB = 1024 * 1024
-

 def fill_mbox(folderdir):
    password = folderdir.joinpath("password")
@@ -204,51 +196,3 @@ 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
-
-
-# --- quota expire tests ---
-
-_msg_counter = itertools.count(1)
-
-
-def _create_message(basedir, sub, size, days_old=0, disk_size=None):
-    seq = next(_msg_counter)
-    mtime = int(time.time() - days_old * 86400)
-    name = f"{mtime}.M1P1Q{seq}.hostname,S={size},W={size}:2,S"
-    path = basedir / sub / name
-    path.parent.mkdir(parents=True, exist_ok=True)
-    path.write_bytes(b"x" * (disk_size if disk_size is not None else size))
-    os.utime(path, (mtime, mtime))
-    return path
-
-
-def test_parse_dovecot_filename():
-    e = parse_dovecot_filename("cur/1775324677.M448978P3029757.exam,S=3235,W=3305:2,S")
-    assert e.path == "cur/1775324677.M448978P3029757.exam,S=3235,W=3305:2,S"
-    assert e.mtime == 1775324677
-    assert e.quota_size == 3235
-    assert parse_dovecot_filename("cur/msg_without_structure") is None
-
-
-def test_expire_to_target(tmp_path):
-    _create_message(tmp_path, "cur", MB, days_old=10, disk_size=100)
-    _create_message(tmp_path, "new", MB, days_old=5)
-    _create_message(tmp_path, "cur", MB, days_old=0)  # undeletable (<1 hour)
-    assert len(scan_mailbox_messages(tmp_path)) == 3
-    # removes oldest first, uses S= size not disk size
-    removed = expire_to_target(tmp_path, MB)
-    assert removed == 2
-    msgs = scan_mailbox_messages(tmp_path)
-    assert len(msgs) == 1
-    # the surviving message is the fresh undeletable one
-    assert msgs[0].mtime > time.time() - 3600
-
-
-def test_quota_expire_main(tmp_path, capsys):
-    mbox = tmp_path / "user@example.org"
-    _create_message(mbox, "cur", 2 * MB, days_old=5)
-    (mbox / "maildirsize").write_text("x")
-    quota_expire_main([str(1), str(mbox)])
-    _, err = capsys.readouterr()
-    assert "quota-expire: removed 1 message(s) from user@example.org" in err
-    assert not (mbox / "maildirsize").exists()
--- a/chatmaild/src/chatmaild/tests/test_newmail.py
+++ b/chatmaild/src/chatmaild/tests/test_newmail.py
@@ -19,12 +19,6 @@ def test_create_newemail_dict(example_config):
    assert ac1["password"] != ac2["password"]


-def test_create_newemail_dict_ip(make_config):
-    config = make_config("1.2.3.4")
-    ac = create_newemail_dict(config)
-    assert ac["email"].endswith("@[1.2.3.4]")
-
-
 def test_create_dclogin_url():
    url = create_dclogin_url("user@example.org", "p@ss w+rd")
    assert url.startswith("dclogin:")
--- a/cmdeploy/src/cmdeploy/cmdeploy.py
+++ b/cmdeploy/src/cmdeploy/cmdeploy.py
@@ -101,6 +101,9 @@ def run_cmd(args, out):
    env["CHATMAIL_WEBSITE_ONLY"] = "True" if args.website_only else ""
    env["CHATMAIL_DISABLE_MAIL"] = "True" if args.disable_mail else ""
    env["CHATMAIL_REQUIRE_IROH"] = "True" if require_iroh else ""
+    if not args.dns_check_disabled:
+        env["CHATMAIL_ADDR_V4"] = remote_data.get("A") or ""
+        env["CHATMAIL_ADDR_V6"] = remote_data.get("AAAA") or ""
    deploy_path = importlib.resources.files(__package__).joinpath("run.py").resolve()
    pyinf = "pyinfra --dry" if args.dry_run else "pyinfra"

@@ -191,6 +194,12 @@ def status_cmd(args, out):


 def test_cmd_options(parser):
+    parser.add_argument(
+        "--slow",
+        dest="slow",
+        action="store_true",
+        help="also run slow tests",
+    )
    add_ssh_host_option(parser)


@@ -212,6 +221,8 @@ def test_cmd(args, out):
        "-v",
        "--durations=5",
    ]
+    if args.slow:
+        pytest_args.append("--slow")
    ret = out.run_ret(pytest_args, env=env)
    return ret

--- a/cmdeploy/src/cmdeploy/deployers.py
+++ b/cmdeploy/src/cmdeploy/deployers.py
@@ -150,6 +150,9 @@ class UnboundDeployer(Deployer):
        self.need_restart = False

    def install(self):
+        # Run local DNS resolver `unbound`. `resolvconf` takes care of
+        # setting up /etc/resolv.conf to use 127.0.0.1 as the resolver.
+
        # On an IPv4-only system, if unbound is started but not configured,
        # it causes subsequent steps to fail to resolve hosts.
        with blocked_service_startup():
@@ -159,31 +162,6 @@ class UnboundDeployer(Deployer):
            )

    def configure(self):
-        # Remove dynamic resolver managers that compete for /etc/resolv.conf.
-        apt.packages(
-            name="Purge resolvconf",
-            packages=["resolvconf"],
-            present=False,
-            extra_uninstall_args="--purge",
-        )
-        # systemd-resolved can't be purged due to dependencies; stop and mask.
-        server.shell(
-            name="Stop and mask systemd-resolved",
-            commands=[
-                "systemctl stop systemd-resolved.service || true",
-                "systemctl mask systemd-resolved.service",
-            ],
-        )
-        # Configure unbound resolver with Quad9 fallback and a trailing newline
-        # (SolusVM bug).
-        files.put(
-            name="Write static resolv.conf",
-            src=BytesIO(b"nameserver 127.0.0.1\nnameserver 9.9.9.9\n"),
-            dest="/etc/resolv.conf",
-            user="root",
-            group="root",
-            mode="644",
-        )
        server.shell(
            name="Generate root keys for validating DNSSEC",
            commands=[
@@ -590,6 +568,14 @@ def deploy_chatmail(config_path: Path, disable_mail: bool, website_only: bool) -
        Deployment().perform_stages([WebsiteDeployer(config)])
        return

+    if host.get_fact(Port, port=53) != "unbound":
+        files.line(
+            name="Add 9.9.9.9 to resolv.conf",
+            path="/etc/resolv.conf",
+            # Guard against resolv.conf missing a trailing newline (SolusVM bug).
+            line="\nnameserver 9.9.9.9",
+        )
+
    # Check if mtail_address interface is available (if configured)
    if config.mtail_address and config.mtail_address not in ('127.0.0.1', '::1', 'localhost'):
        ipv4_addrs = host.get_fact(hardware.Ipv4Addrs)
--- a/cmdeploy/src/cmdeploy/dovecot/deployer.py
+++ b/cmdeploy/src/cmdeploy/dovecot/deployer.py
@@ -4,7 +4,7 @@ import urllib.request
 from chatmaild.config import Config
 from pyinfra import host
 from pyinfra.facts.deb import DebPackages
-from pyinfra.facts.server import Arch, Command, Sysctl
+from pyinfra.facts.server import Arch, Sysctl
 from pyinfra.operations import apt, files, server, systemd

 from cmdeploy.basedeploy import (
@@ -80,17 +80,6 @@ class DovecotDeployer(Deployer):
    def activate(self):
        activate_remote_units(self.units)

-        # Detect stale binary: package installed but service still runs old (deleted) binary.
-        if not self.disable_mail and not self.need_restart:
-            stale = host.get_fact(
-                Command,
-                'pid=$(systemctl show -p MainPID --value dovecot.service 2>/dev/null);'
-                ' [ "${pid:-0}" != "0" ] && readlink "/proc/$pid/exe" 2>/dev/null | grep -q "(deleted)"'
-                " && echo STALE || true",
-            )
-            if stale == "STALE":
-                self.need_restart = True
-
        restart = False if self.disable_mail else self.need_restart

        systemd.service(
@@ -186,7 +175,7 @@ def _configure_dovecot(config: Config, debug: bool = False) -> tuple[bool, bool]
    can_modify = not is_in_container()
    for name in ("max_user_instances", "max_user_watches"):
        key = f"fs.inotify.{name}"
-        value = host.get_fact(Sysctl).get(key, 0)
+        value = host.get_fact(Sysctl)[key]
        if value > 65534:
            continue
        if not can_modify:
--- a/cmdeploy/src/cmdeploy/dovecot/dovecot.conf.j2
+++ b/cmdeploy/src/cmdeploy/dovecot/dovecot.conf.j2
@@ -133,11 +133,6 @@ protocol lmtp {
  # mail_lua and push_notification_lua are needed for Lua push notification handler.
  # <https://doc.dovecot.org/2.3/configuration_manual/push_notification/#configuration>
  mail_plugins = $mail_plugins mail_lua notify push_notification push_notification_lua
-
-  # Disable fsync for LMTP. May lose delivered message,
-  # but unlikely to cause problems with multiple relays.
-  # https://doc.dovecot.org/2.3/admin_manual/mailbox_formats/#fsyncing
-  mail_fsync = never
 }

 plugin {
@@ -149,26 +144,12 @@ plugin {
 }

 plugin {
+  # for now we define static quota-rules for all users 
  quota = maildir:User quota
+  quota_rule = *:storage={{ config.max_mailbox_size }}
  quota_max_mail_size={{ config.max_message_size }}
  quota_grace = 0
-
-  quota_rule = *:storage={{ config.max_mailbox_size_mb }}M
-
-  # Trigger at 75%% of quota, expire oldest messages down to 70%%.
-  # The percentages are chosen to prevent current Delta Chat users
-  # from seeing "quota warnings" which trigger at 80% and 95%.
-
-  quota_warning = storage=75%% quota-warning {{ config.max_mailbox_size_mb * 70 // 100 }} {{ config.mailboxes_dir }}/%u
-}
-
-service quota-warning {
-  executable = script /usr/local/lib/chatmaild/venv/bin/chatmail-quota-expire
-  user = vmail
-  unix_listener quota-warning {
-     user = vmail
-     mode = 0600
-  }
+  # quota_over_flag_value = TRUE
 }

 # push_notification configuration
@@ -271,9 +252,6 @@ protocol imap {
  # sort -sn <(sed 's/ / C: /' *.in) <(sed 's/ / S: /' cat *.out)

  rawlog_dir = %h 
-
-  # Disable fsync for IMAP. May lose IMAP changes like setting flags. 
-  mail_fsync = never
 } 
 {% endif %}

--- a/cmdeploy/src/cmdeploy/filtermail/deployer.py
+++ b/cmdeploy/src/cmdeploy/filtermail/deployer.py
@@ -1,5 +1,3 @@
-import os
-
 from pyinfra import facts, host
 from pyinfra.operations import files, systemd

@@ -7,7 +5,7 @@ from cmdeploy.basedeploy import Deployer, get_resource


 class FiltermailDeployer(Deployer):
-    services = ["filtermail", "filtermail-incoming", "filtermail-transport"]
+    services = ["filtermail", "filtermail-incoming"]
    bin_path = "/usr/local/bin/filtermail"
    config_path = "/usr/local/lib/chatmaild/chatmail.ini"

@@ -15,21 +13,11 @@ class FiltermailDeployer(Deployer):
        self.need_restart = False

    def install(self):
-        local_bin = os.environ.get("CHATMAIL_FILTERMAIL_BINARY")
-        if local_bin:
-            self.need_restart |= files.put(
-                name="Upload locally built filtermail",
-                src=local_bin,
-                dest=self.bin_path,
-                mode="755",
-            ).changed
-            return
-
        arch = host.get_fact(facts.server.Arch)
-        url = f"https://github.com/chatmail/filtermail/releases/download/v0.6.4/filtermail-{arch}"
+        url = f"https://github.com/chatmail/filtermail/releases/download/v0.6.1/filtermail-{arch}"
        sha256sum = {
-            "x86_64": "5295115952c72e4c4ec3c85546e094b4155a4c702c82bd71fcdcb744dc73adf6",
-            "aarch64": "6892244f17b8f26ccb465766e96028e7222b3c8adefca9fc6bfe9ff332ca8dff",
+            "x86_64": "48b3fb80c092d00b9b0a0ef77a8673496da3b9aed5ec1851e1df936d5589d62f",
+            "aarch64": "c65bd5f45df187d3d65d6965a285583a3be0f44a6916ff12909ff9a8d702c22e",
        }[arch]
        self.need_restart |= files.download(
            name="Download filtermail",
--- a/cmdeploy/src/cmdeploy/filtermail/filtermail-transport.service.j2
+++ b/cmdeploy/src/cmdeploy/filtermail/filtermail-transport.service.j2
@@ -1,11 +0,0 @@
-[Unit]
-Description=Chatmail transport service
-
-[Service]
-ExecStart={{ bin_path }} {{ config_path }} transport
-Restart=always
-RestartSec=30
-User=vmail
-
-[Install]
-WantedBy=multi-user.target
--- a/cmdeploy/src/cmdeploy/mtail/delivered_mail.mtail
+++ b/cmdeploy/src/cmdeploy/mtail/delivered_mail.mtail
@@ -78,11 +78,3 @@ counter rejected_unencrypted_mail_count
 /Rejected unencrypted mail/ {
  rejected_unencrypted_mail_count++
 }
-
-counter quota_expire_runs
-counter quota_expire_removed_files
-
-/quota-expire: removed (?P<count>\d+) message\(s\)/ {
-  quota_expire_runs++
-  quota_expire_removed_files += $count
-}
--- a/cmdeploy/src/cmdeploy/mtail/mtail.service.j2
+++ b/cmdeploy/src/cmdeploy/mtail/mtail.service.j2
@@ -1,6 +1,5 @@
 [Unit]
 Description=mtail
-After=multi-user.target

 [Service]
 Type=simple
--- a/cmdeploy/src/cmdeploy/nginx/nginx.conf.j2
+++ b/cmdeploy/src/cmdeploy/nginx/nginx.conf.j2
@@ -73,8 +73,8 @@ http {

 		access_log syslog:server=unix:/dev/log,facility=local7;

-		location /mxdeliv {
-		    proxy_pass http://127.0.0.1:{{ config.filtermail_http_port_incoming }};
+		location /mxdeliv/ {
+		    proxy_pass http://127.0.0.1:{{ config.filtermail_http_port }};
 		}

 		location / {
--- a/cmdeploy/src/cmdeploy/postfix/main.cf.j2
+++ b/cmdeploy/src/cmdeploy/postfix/main.cf.j2
@@ -69,6 +69,15 @@ mynetworks = 127.0.0.0/8
 {% else %}
 mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
 {% endif %}
+{% if config.addr_v4 %}
+smtp_bind_address = {{ config.addr_v4 }}
+{% endif %}
+{% if config.addr_v6 %}
+smtp_bind_address6 = {{ config.addr_v6 }}
+{% endif %}
+{% if config.addr_v4 or config.addr_v6 %}
+smtp_bind_address_enforce = yes
+{% endif %}
 mailbox_size_limit = 0
 message_size_limit = {{config.max_message_size}}
 recipient_delimiter = +
@@ -79,6 +88,22 @@ inet_protocols = ipv4
 inet_protocols = all
 {% endif %}

+# Postfix does not try IPv4 and IPv6 connections
+# concurrently as of version 3.7.11.
+#
+# When relay has both A (IPv4) and AAAA (IPv6) records,
+# but broken IPv6 connectivity,
+# every second message is delayed by the connection timeout
+# <https://www.postfix.org/postconf.5.html#smtp_connect_timeout>
+# which defaults to 30 seconds. Reducing timeouts is not a solution
+# as this will result in a failure to connect to slow servers.
+#
+# As a workaround we always prefer IPv4 when it is available.
+# 
+# The setting is documented at
+# <https://www.postfix.org/postconf.5.html#smtp_address_preference>
+smtp_address_preference=ipv4
+
 virtual_transport = lmtp:unix:private/dovecot-lmtp
 virtual_mailbox_domains = {{ config.mail_domain }}
 lmtp_header_checks = regexp:/etc/postfix/lmtp_header_cleanup
@@ -93,10 +118,3 @@ smtpd_sender_login_maps = regexp:/etc/postfix/login_map
 # Do not lookup SMTP client hostnames to reduce delays
 # and avoid unnecessary DNS requests.
 smtpd_peername_lookup = no
-
-# Use filtermail-transport to relay messages.
-# We can't force postfix to split messages per destination,
-# when specifying a custom next-hop,
-# so instead this is handled in filtermail.
-# We use LMTP instead SMTP so we can communicate per-recipient errors back to postfix.
-default_transport = lmtp-filtermail:inet:[127.0.0.1]:{{ config.filtermail_lmtp_port_transport }}
--- a/cmdeploy/src/cmdeploy/postfix/master.cf.j2
+++ b/cmdeploy/src/cmdeploy/postfix/master.cf.j2
@@ -100,8 +100,3 @@ filter    unix -        n       n       -       -       lmtp
 # cannot send unprotected Subject.
 authclean unix  n       -       -       -       0       cleanup
  -o header_checks=regexp:/etc/postfix/submission_header_cleanup
-
-lmtp-filtermail unix  -       -       y       -       -       lmtp
-  -o syslog_name=postfix/lmtp-filtermail
-  -o lmtp_header_checks=
-  -o lmtp_tls_security_level=none
--- a/cmdeploy/src/cmdeploy/tests/online/test_1_basic.py
+++ b/cmdeploy/src/cmdeploy/tests/online/test_1_basic.py
@@ -221,6 +221,7 @@ def test_rewrite_subject(cmsetup, maildata):
    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."""
    user1, user2 = cmsetup.gen_users(2)
@@ -243,6 +244,7 @@ def test_exceed_rate_limit(cmsetup, gencreds, maildata, chatmail_config):
    pytest.fail("Rate limit was not exceeded")


+@pytest.mark.slow
 def test_expunged(remote, chatmail_config):
    outdated_days = int(chatmail_config.delete_mails_after) + 1
    find_cmds = [
--- a/cmdeploy/src/cmdeploy/tests/plugin.py
+++ b/cmdeploy/src/cmdeploy/tests/plugin.py
@@ -1,5 +1,4 @@
 import imaplib
-import ipaddress
 import itertools
 import os
 import random
@@ -15,12 +14,10 @@ from chatmaild.config import read_config
 conftestdir = Path(__file__).parent


-def _is_ip(domain):
-    try:
-        ipaddress.ip_address(domain)
-        return True
-    except ValueError:
-        return False
+def pytest_addoption(parser):
+    parser.addoption(
+        "--slow", action="store_true", default=False, help="also run slow tests"
+    )


 def pytest_configure(config):
@@ -30,6 +27,13 @@ def pytest_configure(config):
    )


+def pytest_runtest_setup(item):
+    markers = list(item.iter_markers(name="slow"))
+    if markers:
+        if not item.config.getoption("--slow"):
+            pytest.skip("skipping slow test, use --slow to run")
+
+
 def _get_chatmail_config():
    inipath = os.environ.get("CHATMAIL_INI")
    if inipath:
@@ -278,7 +282,6 @@ def gencreds(chatmail_config):

    def gen(domain=None):
        domain = domain if domain else chatmail_config.mail_domain
-        addr_domain = f"[{domain}]" if _is_ip(domain) else domain
        while 1:
            num = next(count)
            alphanumeric = "abcdefghijklmnopqrstuvwxyz1234567890"
@@ -292,7 +295,7 @@ def gencreds(chatmail_config):
            password = "".join(
                random.choices(alphanumeric, k=chatmail_config.password_min_length)
            )
-            yield f"{user}@{addr_domain}", f"{password}"
+            yield f"{user}@{domain}", f"{password}"

    return lambda domain=None: next(gen(domain))

@@ -341,22 +344,9 @@ class ChatmailACFactory:
        accounts = []
        for _ in range(num):
            account = self.dc.add_account()
-            addr, password = self.gencreds(domain)
-            if _is_ip(domain):
-                # Use DCLOGIN scheme with explicit server hosts,
-                # matching how madmail presents its addresses to users.
-                qr = (
-                    f"dclogin:{addr}"
-                    f"?p={password}&v=1"
-                    f"&ih={domain}&ip=993"
-                    f"&sh={domain}&sp=465"
-                    f"&ic=3&ss=default"
-                )
-                future = account.add_transport_from_qr.future(qr)
-            else:
-                future = account.add_or_update_transport.future(
-                    self._make_transport(domain)
-                )
+            future = account.add_or_update_transport.future(
+                self._make_transport(domain)
+            )
            futures.append(future)

            # ensure messages stay in INBOX so that they can be
--- a/cmdeploy/src/cmdeploy/tests/test_dovecot_deployer.py
+++ b/cmdeploy/src/cmdeploy/tests/test_dovecot_deployer.py
@@ -2,9 +2,9 @@ from contextlib import nullcontext
 from types import SimpleNamespace

 import pytest
-from pyinfra.facts.deb import DebPackages

 from cmdeploy.dovecot import deployer as dovecot_deployer
+from pyinfra.facts.deb import DebPackages


 def make_host(*fact_pairs):
--- a/cmdeploy/src/cmdeploy/tests/test_helpers.py
+++ b/cmdeploy/src/cmdeploy/tests/test_helpers.py
@@ -1,10 +1,11 @@
-from pathlib import Path
+import importlib.resources

 from cmdeploy.www import build_webpages


 def test_build_webpages(tmp_path, make_config):
-    src_dir = (Path(__file__).resolve() / "../../../../../www/src").resolve()
+    pkgroot = importlib.resources.files("cmdeploy")
+    src_dir = pkgroot.joinpath("../../../www/src").resolve()
    assert src_dir.exists(), src_dir
    config = make_config("chat.example.org")
    build_dir = tmp_path.joinpath("build")
--- a/cmdeploy/src/cmdeploy/www.py
+++ b/cmdeploy/src/cmdeploy/www.py
@@ -1,4 +1,5 @@
 import hashlib
+import importlib.resources
 import re
 import time
 import traceback
@@ -36,7 +37,7 @@ def prepare_template(source):


 def get_paths(config) -> (Path, Path, Path):
-    reporoot = (Path(__file__).resolve() / "../../../../").resolve()
+    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 == "":
@@ -132,7 +133,8 @@ def find_merge_conflict(src_dir) -> Path:


 def main():
-    reporoot = (Path(__file__).resolve() / "../../../../").resolve()
+    path = importlib.resources.files(__package__)
+    reporoot = path.joinpath("../../../").resolve()
    inipath = reporoot.joinpath("chatmail.ini")
    config = read_config(inipath)
    config.webdev = True
--- a/doc/README.md
+++ b/doc/README.md
@@ -4,14 +4,12 @@

 You can use the `make` command and `make html` to build web pages. 

-You need a Python environment with `sphinx` and other
-dependencies, you can create it by running `scripts/initenv.sh`
-from the repository root.
+You need a Python environment where the following install was excuted: 
+
+    pip install furo sphinx-autobuild

 To develop/change documentation, you can then do: 

-    . venv/bin/activate
-    cd doc
    make auto 

 A page will open at https://127.0.0.1:8000/ serving the docs and it will 
--- a/doc/source/getting_started.rst
+++ b/doc/source/getting_started.rst
@@ -98,6 +98,13 @@ steps. Please substitute it with your own domain.
   configure at your DNS provider (it can take some time until they are
   public).

+Docker installation
+-------------------
+
+There is experimental support for running chatmail via Docker Compose.
+See the `chatmail/docker README <https://github.com/chatmail/docker>`_
+for full setup instructions.
+
 Other helpful commands
 ----------------------

--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -16,6 +16,5 @@ Contributions and feedback welcome through the https://github.com/chatmail/relay
    proxy
    migrate
    overview
-    reverse_dns
    related
    faq
--- a/doc/source/overview.rst
+++ b/doc/source/overview.rst
@@ -102,12 +102,8 @@ short overview of ``chatmaild`` services:
   Apple/Google/Huawei.

 -  `chatmail-expire <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/expire.py>`_
-   deletes old messages, large messages, and entire mailboxes
-   of users who have not logged in for longer than
-   ``delete_inactive_users_after`` days.
-
-  ``chatmail-quota-expire`` is called by Dovecot's ``quota_warning`` mechanism
-   and will automatically remove oldest messages to keep mailboxes well under ``max_mailbox_size``.
+   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
@@ -153,7 +149,6 @@ Chatmail relay dependency diagram
        autoconfig.xml --- dovecot;
        postfix --- |10080|filtermail-outgoing;
        postfix --- |10081|filtermail-incoming;
-        postfix --- |10083|filtermail-transport;
        filtermail-outgoing --- |10025 reinject|postfix;
        filtermail-incoming --- |10026 reinject|postfix;
        dovecot --- |doveauth.socket|doveauth;
@@ -161,8 +156,6 @@ Chatmail relay dependency diagram
        /home/vmail/.../user"];
        dovecot --- |lastlogin.socket|lastlogin;
        dovecot --- chatmail-metadata;
-        dovecot --- |quota-warning|chatmail-quota-expire;
-        chatmail-quota-expire --- maildir;
        lastlogin --- maildir;
        doveauth --- maildir;
        chatmail-expire-daily --- maildir;
@@ -296,7 +289,9 @@ ensured by ``filtermail`` proxy.
 TLS requirements
 ~~~~~~~~~~~~~~~~

-Filtermail (used for delivery) requires a valid TLS.
+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``.

 You can test it by resolving ``MX`` records of your relay domain and
 then connecting to MX relays (e.g ``mx.example.org``) with
--- a/doc/source/reverse_dns.rst
+++ b/doc/source/reverse_dns.rst
@@ -1,64 +0,0 @@
-Configuring reverse DNS
-=======================
-
-Some email servers reject the emails
-if they don't pass `FCrDNS`_ check, also known as `iprev`_ check.
-
-.. _FCrDNS: https://en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS
-.. _iprev: https://datatracker.ietf.org/doc/html/rfc8601#section-3
-
-Passing the check requires that the IP address that email is sent from
-should have a ``PTR`` record pointing to the domain name of the server,
-and domain name record should have an ``A/AAAA`` record
-pointing to the IP address.
-
-Modern email relies on DKIM and SPF for authentication,
-while iprev check exists for
-`historical reasons <https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-reverse-mapping-considerations-06#section-2.1>`_.
-Chatmail relays don't resolve ``PTR`` records,
-so you can ignore this section if configuring ``PTR`` records
-is difficult and federation with legacy email servers that don't accept
-valid DKIM signature for authentication is not important.
-
-Multi-homed setups
------------------
-
-If you have a server with multiple IP addresses,
-also known as multi-homed setup,
-and don't publish all IP addresses in DNS,
-you need to make sure you are using
-the published address when making outgoing connections.
-
-For example, your server may have a static IP
-address, and a so-called Floating IP or Virtual IP
-that can be moved between servers in case of
-migration or for failover.
-By using Floating IP you can avoid downtime
-and keep the IP address reputation
-for destinatinons that rely on IP reputation and IP blocklists.
-In this case you will only publish
-the Floating IP to DNS and only use the static IP
-to SSH into the server.
-
-If you have such setup, make sure that
-you not only set ``PTR`` records for the Floating IP,
-but make outgoing connections using the Floating IP.
-Otherwise reverse DNS check succeed,
-but forward check making sure your domain name points
-to the IP address will fail.
-Such setup is indistinguishable from someone
-setting IP address ``PTR`` with the domain they don't own
-and as a result don't succeed.
-
-On Linux you can configure source IP address with ``ip route`` command,
-for example:
-::
-
-  ip route change default via <default-gateway> dev eth0 src <source-address>
-
-Make sure to persist the change after verifying it is working.
-You can check what your outgoing IP address is
-with ``curl icanhazip.com``.
-Check both the IPv4 and IPv6 addresses.
-For IPv4 address use ``curl ipv4.icanhazip.com`` or ``curl -4 icanhazip.com``
-and similarly for IPv6 if you have it.