add missing changelog entries

fix: Handle case where user followed the tutorial and set the CNAME reccord for mta-sts, but no TXT record for it yet.

.github/workflows/docs-preview.yaml

@@ -11,6 +11,9 @@ jobs:
   scripts:
     name: build 
     runs-on: ubuntu-latest
+    environment:
+      name: 'staging.chatmail.at/doc/relay/'
+      url: https://staging.chatmail.at/doc/relay/${{ steps.prepare.outputs.prid }}
     steps:
       - uses: actions/checkout@v4
 
@@ -44,36 +47,6 @@ jobs:
           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

@@ -14,6 +14,9 @@ jobs:
   scripts:
     name: build 
     runs-on: ubuntu-latest
+    environment: 
+      name: 'chatmail.at/doc/relay/'
+      url: https://chatmail.at/doc/relay/
     steps:
       - uses: actions/checkout@v4
 

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

@@ -16,6 +16,9 @@ jobs:
     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:
       group: ci-ipv4-${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: ${{ !contains(github.ref, '$GITHUB_REF') }}

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

@@ -16,6 +16,9 @@ jobs:
     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:
       group: ci-${{ github.workflow }}-${{ github.ref }}
       cancel-in-progress: ${{ !contains(github.ref, '$GITHUB_REF') }}
@@ -70,6 +73,9 @@ 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: 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 
 

CHANGELOG.md

@@ -2,6 +2,21 @@
 
 ## untagged
 
+- Add imap_compress option to chatmail.ini
+  ([#760](https://github.com/chatmail/relay/pull/760))
+
+- Remove echobot from relays 
+  ([#753](https://github.com/chatmail/relay/pull/753))
+
+- Fix `cmdeploy webdev`
+  ([#743](https://github.com/chatmail/relay/pull/743))
+
+- Add robots.txt to exclude all web crawlers
+  ([#732](https://github.com/chatmail/relay/pull/732))
+
+- acmetool: accept new Let's Encrypt ToS: https://letsencrypt.org/documents/LE-SA-v1.6-August-18-2025.pdf
+  ([#729](https://github.com/chatmail/relay/pull/729))
+
 - Organized cmdeploy into install, configure, and activate stages
   ([#695](https://github.com/chatmail/relay/pull/695))
 
@@ -21,10 +36,10 @@
   ([#689](https://github.com/chatmail/relay/pull/689))
 
 - Require TLS 1.2 for outgoing SMTP connections
-  ([#685](https://github.com/chatmail/relay/pull/685))
+  ([#685](https://github.com/chatmail/relay/pull/685), [#730](https://github.com/chatmail/relay/pull/730))
 
 - require STARTTLS for incoming port 25 connections
-  ([#684](https://github.com/chatmail/relay/pull/684))
+  ([#684](https://github.com/chatmail/relay/pull/684), [#730](https://github.com/chatmail/relay/pull/730))
 
 - filtermail: run CPU-intensive handle_DATA in a thread pool executor
   ([#676](https://github.com/chatmail/relay/pull/676))

chatmaild/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "chatmaild"
-version = "0.2"
+version = "0.3"
 dependencies = [
   "aiosmtpd",
   "iniconfig",
@@ -25,7 +25,6 @@ where = ['src']
 doveauth = "chatmaild.doveauth:main"
 chatmail-metadata = "chatmaild.metadata:main"
 filtermail = "chatmaild.filtermail:main"
-echobot = "chatmaild.echo:main"
 chatmail-metrics = "chatmaild.metrics:main"
 chatmail-expire = "chatmaild.expire:main"
 chatmail-fsreport = "chatmaild.fsreport:main"
@@ -73,5 +72,6 @@ commands =
 deps = pytest 
        pdbpp 
        pytest-localserver
+       execnet
 commands = pytest -v -rsXx {posargs}
 """

chatmaild/src/chatmaild/config.py

@@ -4,8 +4,6 @@ import iniconfig
 
 from chatmaild.user import User
 
-echobot_password_path = Path("/run/echobot/password")
-
 
 def read_config(inipath):
     assert Path(inipath).exists(), inipath
@@ -46,6 +44,7 @@ class Config:
         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"
+        self.imap_compress = params.get("imap_compress", "false").lower() == "true"
         if "iroh_relay" not in params:
             self.iroh_relay = "https://" + params["mail_domain"]
             self.enable_iroh_relay = True
@@ -72,10 +71,7 @@ class Config:
             raise ValueError(f"invalid address {addr!r}")
 
         maildir = self.mailboxes_dir.joinpath(addr)
-        if addr.startswith("echo@"):
-            password_path = echobot_password_path
-        else:
-            password_path = maildir.joinpath("password")
+        password_path = maildir.joinpath("password")
 
         return User(maildir, addr, password_path, uid="vmail", gid="vmail")
 

chatmaild/src/chatmaild/doveauth.py

@@ -40,10 +40,6 @@ def is_allowed_to_create(config: Config, user, cleartext_password) -> bool:
         return False
     localpart, domain = parts
 
-    if localpart == "echo":
-        # echobot account should not be created in the database
-        return False
-
     if (
         len(localpart) > config.username_max_length
         or len(localpart) < config.username_min_length

chatmaild/src/chatmaild/echo.py

@@ -1,109 +0,0 @@
-#!/usr/bin/env python3
-"""Advanced echo bot example.
-
-it will echo back any message that has non-empty text and also supports the /help command.
-"""
-
-import logging
-import os
-import subprocess
-import sys
-from pathlib import Path
-
-from deltachat_rpc_client import Bot, DeltaChat, EventType, Rpc, events
-
-from chatmaild.config import echobot_password_path, read_config
-from chatmaild.doveauth import encrypt_password
-from chatmaild.newemail import create_newemail_dict
-
-hooks = events.HookCollection()
-
-
-@hooks.on(events.RawEvent)
-def log_event(event):
-    if event.kind == EventType.INFO:
-        logging.info(event.msg)
-    elif event.kind == EventType.WARNING:
-        logging.warning(event.msg)
-
-
-@hooks.on(events.RawEvent(EventType.ERROR))
-def log_error(event):
-    logging.error("%s", event.msg)
-
-
-@hooks.on(events.MemberListChanged)
-def on_memberlist_changed(event):
-    logging.info(
-        "member %s was %s", event.member, "added" if event.member_added else "removed"
-    )
-
-
-@hooks.on(events.GroupImageChanged)
-def on_group_image_changed(event):
-    logging.info("group image %s", "deleted" if event.image_deleted else "changed")
-
-
-@hooks.on(events.GroupNameChanged)
-def on_group_name_changed(event):
-    logging.info(f"group name changed, old name: {event.old_name}")
-
-
-@hooks.on(events.NewMessage(func=lambda e: not e.command))
-def echo(event):
-    snapshot = event.message_snapshot
-    if snapshot.is_info:
-        # Ignore info messages
-        return
-    if snapshot.text or snapshot.file:
-        snapshot.chat.send_message(text=snapshot.text, file=snapshot.file)
-
-
-@hooks.on(events.NewMessage(command="/help"))
-def help_command(event):
-    snapshot = event.message_snapshot
-    snapshot.chat.send_text("Send me any message and I will echo it back")
-
-
-def main():
-    logging.basicConfig(level=logging.INFO)
-    path = os.environ.get("PATH")
-    venv_path = sys.argv[0].strip("echobot")
-    os.environ["PATH"] = path + ":" + venv_path
-    with Rpc() as rpc:
-        deltachat = DeltaChat(rpc)
-        system_info = deltachat.get_system_info()
-        logging.info(f"Running deltachat core {system_info.deltachat_core_version}")
-
-        accounts = deltachat.get_all_accounts()
-        account = accounts[0] if accounts else deltachat.add_account()
-
-        bot = Bot(account, hooks)
-
-        config = read_config(sys.argv[1])
-        addr = "echo@" + config.mail_domain
-
-        # Create password file
-        if bot.is_configured():
-            password = bot.account.get_config("mail_pw")
-        else:
-            password = create_newemail_dict(config)["password"]
-
-        echobot_password_path.write_text(encrypt_password(password))
-        # Give the user which doveauth runs as access to the password file.
-        subprocess.check_call(
-            ["/usr/bin/setfacl", "-m", "user:vmail:r", echobot_password_path],
-        )
-
-        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()
-
-
-if __name__ == "__main__":
-    main()

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

@@ -45,7 +45,7 @@ passthrough_senders =
 # (space-separated, item may start with "@" to whitelist whole recipient domains)
 passthrough_recipients = echo@{mail_domain}
 
-# path to www directory - documented here: https://github.com/chatmail/relay/#custom-web-pages
+# path to www directory - documented here: https://chatmail.at/doc/relay/getting_started.html#custom-web-pages
 #www_folder = www
 
 #
@@ -99,6 +99,12 @@ acme_email =
 # so use this option with caution on production servers. 
 imap_rawlog = false 
 
+# set to true if you want to enable the IMAP COMPRESS Extension,
+# which allows IMAP connections to be efficiently compressed.
+# WARNING: Enabling this makes it impossible to hibernate IMAP
+# processes which will result in much higher memory/RAM usage.
+imap_compress = false
+
 
 #
 # Privacy Policy

chatmaild/src/chatmaild/tests/test_lastlogin.py

@@ -36,29 +36,3 @@ def test_handle_dovecot_request_last_login(testaddr, example_config):
     res = dictproxy.handle_dovecot_request(msg, dictproxy_transactions)
     assert res == "O\n"
     assert len(dictproxy_transactions) == 0
-
-
-def test_handle_dovecot_request_last_login_echobot(example_config):
-    dictproxy = LastLoginDictProxy(config=example_config)
-
-    authproxy = AuthDictProxy(config=example_config)
-    testaddr = f"echo@{example_config.mail_domain}"
-    authproxy.lookup_passdb(testaddr, "ignore")
-    user = dictproxy.config.get_user(testaddr)
-
-    transactions = {}
-
-    # set last-login info for user
-    tx = "1111"
-    msg = f"B{tx}\t{testaddr}"
-    res = dictproxy.handle_dovecot_request(msg, transactions)
-    assert not res
-    assert transactions == {tx: dict(addr=testaddr, res="O\n")}
-
-    timestamp = int(time.time())
-    msg = f"S{tx}\tshared/last-login/{testaddr}\t{timestamp}"
-    res = dictproxy.handle_dovecot_request(msg, transactions)
-    assert not res
-    assert len(transactions) == 1
-    read_timestamp = user.get_last_login_timestamp()
-    assert read_timestamp is None

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

@@ -1,2 +1,2 @@
 "acme-enter-email": "{{ email }}"
-"acme-agreement:https://letsencrypt.org/documents/LE-SA-v1.5-February-24-2025.pdf": true
+"acme-agreement:https://letsencrypt.org/documents/LE-SA-v1.6-August-18-2025.pdf": true

cmdeploy/src/cmdeploy/basedeploy.py

@@ -1,6 +1,61 @@
+import importlib.resources
+import io
 import os
 
-from pyinfra.operations import server
+from pyinfra.operations import files, server, systemd
+
+
+def get_resource(arg, pkg=__package__):
+    return importlib.resources.files(pkg).joinpath(arg)
+
+
+def configure_remote_units(mail_domain, units) -> None:
+    remote_base_dir = "/usr/local/lib/chatmaild"
+    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")
+
+    # install systemd units
+    for fn in units:
+        execpath = fn if fn != "filtermail-incoming" else "filtermail"
+        params = dict(
+            execpath=f"{remote_venv_dir}/bin/{execpath}",
+            config_path=remote_chatmail_inipath,
+            remote_venv_dir=remote_venv_dir,
+            mail_domain=mail_domain,
+        )
+
+        basename = fn if "." in fn else f"{fn}.service"
+
+        source_path = get_resource(f"service/{basename}.f")
+        content = source_path.read_text().format(**params).encode()
+
+        files.put(
+            name=f"Upload {basename}",
+            src=io.BytesIO(content),
+            dest=f"/etc/systemd/system/{basename}",
+            **root_owned,
+        )
+
+
+def activate_remote_units(units) -> None:
+    # activate systemd units
+    for fn in units:
+        basename = fn if "." in fn else f"{fn}.service"
+
+        if fn == "chatmail-expire" or fn == "chatmail-fsreport":
+            # don't auto-start but let the corresponding timer trigger execution
+            enabled = False
+        else:
+            enabled = True
+        systemd.service(
+            name=f"Setup {basename}",
+            service=basename,
+            running=enabled,
+            enabled=enabled,
+            restarted=enabled,
+            daemon_reload=True,
+        )
 
 
 class Deployment:

cmdeploy/src/cmdeploy/cmdeploy.py

@@ -109,15 +109,6 @@ def run_cmd(args, out):
     try:
         retcode = out.check_call(cmd, env=env)
         if retcode == 0:
-            if not args.disable_mail:
-                print("\nYou can try out the relay by talking to this echo bot: ")
-                sshexec = SSHExec(args.config.mail_domain, verbose=args.verbose)
-                print(
-                    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")

cmdeploy/src/cmdeploy/deployers.py

@@ -2,26 +2,34 @@
 Chat Mail pyinfra deploy.
 """
 
-import importlib.resources
-import io
 import shutil
 import subprocess
 import sys
 from io import StringIO
 from pathlib import Path
 
-from chatmaild.config import Config, read_config
+from chatmaild.config import read_config
 from pyinfra import facts, host, logger
 from pyinfra.api import FactBase
-from pyinfra.facts.files import File, Sha256File
-from pyinfra.facts.server import Sysctl
+from pyinfra.facts.files import Sha256File
 from pyinfra.facts.systemd import SystemdEnabled
 from pyinfra.operations import apt, files, pip, server, systemd
 
 from cmdeploy.cmdeploy import Out
 
 from .acmetool import AcmetoolDeployer
-from .basedeploy import Deployer, Deployment
+from .basedeploy import (
+    Deployer,
+    Deployment,
+    activate_remote_units,
+    configure_remote_units,
+    get_resource,
+)
+from .dovecot.deployer import DovecotDeployer
+from .mtail.deployer import MtailDeployer
+from .nginx.deployer import NginxDeployer
+from .opendkim.deployer import OpendkimDeployer
+from .postfix.deployer import PostfixDeployer
 from .www import build_webpages, find_merge_conflict, get_paths
 
 
@@ -40,10 +48,6 @@ class Port(FactBase):
         return output[0]
 
 
-def get_resource(arg, pkg=__package__):
-    return importlib.resources.files(pkg).joinpath(arg)
-
-
 def _build_chatmaild(dist_dir) -> None:
     dist_dir = Path(dist_dir).resolve()
     if dist_dir.exists():
@@ -135,171 +139,6 @@ def _configure_remote_venv_with_chatmaild(config) -> None:
     )
 
 
-def _configure_remote_units(mail_domain, units) -> None:
-    remote_base_dir = "/usr/local/lib/chatmaild"
-    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")
-
-    # install systemd units
-    for fn in units:
-        execpath = fn if fn != "filtermail-incoming" else "filtermail"
-        params = dict(
-            execpath=f"{remote_venv_dir}/bin/{execpath}",
-            config_path=remote_chatmail_inipath,
-            remote_venv_dir=remote_venv_dir,
-            mail_domain=mail_domain,
-        )
-
-        basename = fn if "." in fn else f"{fn}.service"
-
-        source_path = get_resource(f"service/{basename}.f")
-        content = source_path.read_text().format(**params).encode()
-
-        files.put(
-            name=f"Upload {basename}",
-            src=io.BytesIO(content),
-            dest=f"/etc/systemd/system/{basename}",
-            **root_owned,
-        )
-
-
-def _activate_remote_units(units) -> None:
-    # activate systemd units
-    for fn in units:
-        basename = fn if "." in fn else f"{fn}.service"
-
-        if fn == "chatmail-expire" or fn == "chatmail-fsreport":
-            # don't auto-start but let the corresponding timer trigger execution
-            enabled = False
-        else:
-            enabled = True
-        systemd.service(
-            name=f"Setup {basename}",
-            service=basename,
-            running=enabled,
-            enabled=enabled,
-            restarted=enabled,
-            daemon_reload=True,
-        )
-
-
-def _configure_opendkim(domain: str, dkim_selector: str = "dkim") -> bool:
-    """Configures OpenDKIM"""
-    need_restart = False
-
-    main_config = files.template(
-        src=get_resource("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=get_resource("opendkim/screen.lua"),
-        dest="/etc/opendkim/screen.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= screen_script.changed
-
-    final_script = files.put(
-        src=get_resource("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=get_resource("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=get_resource("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,
-    )
-
-    if not host.get_fact(File, f"/etc/dkimkeys/{dkim_selector}.private"):
-        server.shell(
-            name="Generate OpenDKIM domain keys",
-            commands=[
-                f"/usr/sbin/opendkim-genkey -D /etc/dkimkeys -d {domain} -s {dkim_selector}"
-            ],
-            _use_su_login=True,
-            _su_user="opendkim",
-        )
-
-    service_file = files.put(
-        name="Configure opendkim to restart once a day",
-        src=get_resource("opendkim/systemd.conf"),
-        dest="/etc/systemd/system/opendkim.service.d/10-prevent-memory-leak.conf",
-    )
-    need_restart |= service_file.changed
-
-    return need_restart
-
-
-class OpendkimDeployer(Deployer):
-    required_users = [("opendkim", None, ["opendkim"])]
-
-    def __init__(self, mail_domain):
-        self.mail_domain = mail_domain
-
-    def install(self):
-        apt.packages(
-            name="apt install opendkim opendkim-tools",
-            packages=["opendkim", "opendkim-tools"],
-        )
-
-    def configure(self):
-        self.need_restart = _configure_opendkim(self.mail_domain, "opendkim")
-
-    def activate(self):
-        systemd.service(
-            name="Start and enable OpenDKIM",
-            service="opendkim.service",
-            running=True,
-            enabled=True,
-            daemon_reload=self.need_restart,
-            restarted=self.need_restart,
-        )
-        self.need_restart = False
-
-
 class UnboundDeployer(Deployer):
     def install(self):
         # Run local DNS resolver `unbound`.
@@ -371,320 +210,6 @@ class MtastsDeployer(Deployer):
         )
 
 
-def _configure_postfix(config: Config, debug: bool = False) -> bool:
-    """Configures Postfix SMTP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=get_resource("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=get_resource("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=get_resource("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=get_resource("postfix/login_map"),
-        dest="/etc/postfix/login_map",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= login_map.changed
-
-    return need_restart
-
-
-class PostfixDeployer(Deployer):
-    required_users = [("postfix", None, ["opendkim"])]
-
-    def __init__(self, config, disable_mail):
-        self.config = config
-        self.disable_mail = disable_mail
-
-    def install(self):
-        apt.packages(
-            name="Install Postfix",
-            packages="postfix",
-        )
-
-    def configure(self):
-        self.need_restart = _configure_postfix(self.config)
-
-    def activate(self):
-        restart = False if self.disable_mail else self.need_restart
-
-        systemd.service(
-            name="disable postfix for now"
-            if self.disable_mail
-            else "Start and enable Postfix",
-            service="postfix.service",
-            running=False if self.disable_mail else True,
-            enabled=False if self.disable_mail else True,
-            restarted=restart,
-        )
-        self.need_restart = False
-
-
-def _install_dovecot_package(package: str, arch: str):
-    arch = "amd64" if arch == "x86_64" else arch
-    arch = "arm64" if arch == "aarch64" else arch
-    url = f"https://download.delta.chat/dovecot/dovecot-{package}_2.3.21%2Bdfsg1-3_{arch}.deb"
-    deb_filename = "/root/" + url.split("/")[-1]
-
-    match (package, arch):
-        case ("core", "amd64"):
-            sha256 = "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d"
-        case ("core", "arm64"):
-            sha256 = "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9"
-        case ("imapd", "amd64"):
-            sha256 = "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86"
-        case ("imapd", "arm64"):
-            sha256 = "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f"
-        case ("lmtpd", "amd64"):
-            sha256 = "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab"
-        case ("lmtpd", "arm64"):
-            sha256 = "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f"
-        case _:
-            apt.packages(packages=[f"dovecot-{package}"])
-            return
-
-    files.download(
-        name=f"Download dovecot-{package}",
-        src=url,
-        dest=deb_filename,
-        sha256sum=sha256,
-        cache_time=60 * 60 * 24 * 365 * 10,  # never redownload the package
-    )
-
-    apt.deb(name=f"Install dovecot-{package}", src=deb_filename)
-
-
-def _configure_dovecot(config: Config, debug: bool = False) -> bool:
-    """Configures Dovecot IMAP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=get_resource("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=get_resource("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=get_resource("dovecot/push_notification.lua"),
-        dest="/etc/dovecot/push_notification.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= lua_push_notification_script.changed
-
-    # 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}"
-        if host.get_fact(Sysctl)[key] > 65535:
-            # Skip updating limits if already sufficient
-            # (enables running in incus containers where sysctl readonly)
-            continue
-        server.sysctl(
-            name=f"Change {key}",
-            key=key,
-            value=65535,
-            persist=True,
-        )
-
-    timezone_env = files.line(
-        name="Set TZ environment variable",
-        path="/etc/environment",
-        line="TZ=:/etc/localtime",
-    )
-    need_restart |= timezone_env.changed
-
-    return need_restart
-
-
-class DovecotDeployer(Deployer):
-    def __init__(self, config, disable_mail):
-        self.config = config
-        self.disable_mail = disable_mail
-        self.units = ["doveauth"]
-
-    def install(self):
-        arch = host.get_fact(facts.server.Arch)
-        if not "dovecot.service" in host.get_fact(SystemdEnabled):
-            _install_dovecot_package("core", arch)
-            _install_dovecot_package("imapd", arch)
-            _install_dovecot_package("lmtpd", arch)
-
-    def configure(self):
-        _configure_remote_units(self.config.mail_domain, self.units)
-        self.need_restart = _configure_dovecot(self.config)
-
-    def activate(self):
-        _activate_remote_units(self.units)
-
-        restart = False if self.disable_mail else self.need_restart
-
-        systemd.service(
-            name="disable dovecot for now"
-            if self.disable_mail
-            else "Start and enable Dovecot",
-            service="dovecot.service",
-            running=False if self.disable_mail else True,
-            enabled=False if self.disable_mail else True,
-            restarted=restart,
-        )
-        self.need_restart = False
-
-
-def _configure_nginx(config: Config, debug: bool = False) -> bool:
-    """Configures nginx HTTP server."""
-    need_restart = False
-
-    main_config = files.template(
-        src=get_resource("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=get_resource("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=get_resource("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=get_resource("newemail.py", pkg="chatmaild").open("rb"),
-        dest=f"{cgi_dir}/newemail.py",
-        user="root",
-        group="root",
-        mode="755",
-    )
-
-    return need_restart
-
-
-class NginxDeployer(Deployer):
-    def __init__(self, config):
-        self.config = config
-
-    def install(self):
-        #
-        # If we allow nginx to start up on install, it will grab port
-        # 80, which then will block acmetool from listening on the port.
-        # That in turn prevents getting certificates, which then causes
-        # an error when we try to start nginx on the custom config
-        # that leaves port 80 open but also requires certificates to
-        # be present.  To avoid getting into that interlocking mess,
-        # we use policy-rc.d to prevent nginx from starting up when it
-        # is installed.
-        #
-        # This approach allows us to avoid performing any explicit
-        # systemd operations during the install stage (as opposed to
-        # allowing it to start and then forcing it to stop), which allows
-        # the install stage to run in non-systemd environments like a
-        # container image build.
-        #
-        # For documentation about policy-rc.d, see:
-        # https://people.debian.org/~hmh/invokerc.d-policyrc.d-specification.txt
-        #
-        files.put(
-            src=get_resource("policy-rc.d"),
-            dest="/usr/sbin/policy-rc.d",
-            user="root",
-            group="root",
-            mode="755",
-        )
-
-        apt.packages(
-            name="Install nginx",
-            packages=["nginx", "libnginx-mod-stream"],
-        )
-
-        files.file("/usr/sbin/policy-rc.d", present=False)
-
-    def configure(self):
-        self.need_restart = _configure_nginx(self.config)
-
-    def activate(self):
-        systemd.service(
-            name="Start and enable nginx",
-            service="nginx.service",
-            running=True,
-            enabled=True,
-            restarted=self.need_restart,
-        )
-        self.need_restart = False
-
-
 class WebsiteDeployer(Deployer):
     def __init__(self, config):
         self.config = config
@@ -745,6 +270,14 @@ class LegacyRemoveDeployer(Deployer):
             path="/var/log/journal/",
             present=False,
         )
+        # remove echobot if it is still running
+        if host.get_fact(SystemdEnabled).get("echobot.service"):
+            systemd.service(
+                name="Disable echobot.service",
+                service="echobot.service",
+                running=False,
+                enabled=False,
+            )
 
 
 def check_config(config):
@@ -790,71 +323,10 @@ class TurnDeployer(Deployer):
             )
 
     def configure(self):
-        _configure_remote_units(self.mail_domain, self.units)
+        configure_remote_units(self.mail_domain, self.units)
 
     def activate(self):
-        _activate_remote_units(self.units)
-
-
-class MtailDeployer(Deployer):
-    def __init__(self, mtail_address):
-        self.mtail_address = mtail_address
-
-    def install(self):
-        # Uninstall mtail package to install a static binary.
-        apt.packages(name="Uninstall mtail", packages=["mtail"], present=False)
-
-        (url, sha256sum) = {
-            "x86_64": (
-                "https://github.com/google/mtail/releases/download/v3.0.8/mtail_3.0.8_linux_amd64.tar.gz",
-                "123c2ee5f48c3eff12ebccee38befd2233d715da736000ccde49e3d5607724e4",
-            ),
-            "aarch64": (
-                "https://github.com/google/mtail/releases/download/v3.0.8/mtail_3.0.8_linux_arm64.tar.gz",
-                "aa04811c0929b6754408676de520e050c45dddeb3401881888a092c9aea89cae",
-            ),
-        }[host.get_fact(facts.server.Arch)]
-
-        server.shell(
-            name="Download mtail",
-            commands=[
-                f"(echo '{sha256sum} /usr/local/bin/mtail' | sha256sum -c) || (curl -L {url} | gunzip | tar -x -f - mtail -O >/usr/local/bin/mtail.new && mv /usr/local/bin/mtail.new /usr/local/bin/mtail)",
-                "chmod 755 /usr/local/bin/mtail",
-            ],
-        )
-
-    def configure(self):
-        # 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=get_resource("mtail/mtail.service.j2"),
-            dest="/etc/systemd/system/mtail.service",
-            user="root",
-            group="root",
-            mode="644",
-            address=self.mtail_address or "127.0.0.1",
-            port=3903,
-        )
-
-        mtail_conf = files.put(
-            name="Mtail configuration",
-            src=get_resource("mtail/delivered_mail.mtail"),
-            dest="/etc/mtail/delivered_mail.mtail",
-            user="root",
-            group="root",
-            mode="644",
-        )
-        self.need_restart = mtail_conf.changed
-
-    def activate(self):
-        systemd.service(
-            name="Start and enable mtail",
-            service="mtail.service",
-            running=bool(self.mtail_address),
-            enabled=bool(self.mtail_address),
-            restarted=self.need_restart,
-        )
-        self.need_restart = False
+        activate_remote_units(self.units)
 
 
 class IrohDeployer(Deployer):
@@ -940,30 +412,6 @@ class JournaldDeployer(Deployer):
         self.need_restart = False
 
 
-class EchobotDeployer(Deployer):
-    #
-    # This deployer depends on the dovecot and postfix deployers because
-    # it needs to base its decision of whether to restart the service on
-    # whether those two services were restarted.
-    #
-    def __init__(self, mail_domain):
-        self.mail_domain = mail_domain
-        self.units = ["echobot"]
-
-    def install(self):
-        apt.packages(
-            # required for setfacl for echobot
-            name="Install acl",
-            packages="acl",
-        )
-
-    def configure(self):
-        _configure_remote_units(self.mail_domain, self.units)
-
-    def activate(self):
-        _activate_remote_units(self.units)
-
-
 class ChatmailVenvDeployer(Deployer):
     def __init__(self, config):
         self.config = config
@@ -983,10 +431,10 @@ class ChatmailVenvDeployer(Deployer):
 
     def configure(self):
         _configure_remote_venv_with_chatmaild(self.config)
-        _configure_remote_units(self.config.mail_domain, self.units)
+        configure_remote_units(self.config.mail_domain, self.units)
 
     def activate(self):
-        _activate_remote_units(self.units)
+        activate_remote_units(self.units)
 
 
 class ChatmailDeployer(Deployer):
@@ -1126,10 +574,8 @@ def deploy_chatmail(config_path: Path, disable_mail: bool) -> None:
         PostfixDeployer(config, disable_mail),
         FcgiwrapDeployer(),
         NginxDeployer(config),
-        EchobotDeployer(mail_domain),
         MtailDeployer(config.mtail_address),
         GithashDeployer(),
     ]
 
     Deployment().perform_stages(all_deployers)
-

cmdeploy/src/cmdeploy/dovecot/deployer.py

@@ -0,0 +1,137 @@
+from chatmaild.config import Config
+from pyinfra import host
+from pyinfra.facts.server import Arch, Sysctl
+from pyinfra.facts.systemd import SystemdEnabled
+from pyinfra.operations import apt, files, server, systemd
+
+from cmdeploy.basedeploy import (
+    Deployer,
+    activate_remote_units,
+    configure_remote_units,
+    get_resource,
+)
+
+
+class DovecotDeployer(Deployer):
+    def __init__(self, config, disable_mail):
+        self.config = config
+        self.disable_mail = disable_mail
+        self.units = ["doveauth"]
+
+    def install(self):
+        arch = host.get_fact(Arch)
+        if not "dovecot.service" in host.get_fact(SystemdEnabled):
+            _install_dovecot_package("core", arch)
+            _install_dovecot_package("imapd", arch)
+            _install_dovecot_package("lmtpd", arch)
+
+    def configure(self):
+        configure_remote_units(self.config.mail_domain, self.units)
+        self.need_restart = _configure_dovecot(self.config)
+
+    def activate(self):
+        activate_remote_units(self.units)
+
+        restart = False if self.disable_mail else self.need_restart
+
+        systemd.service(
+            name="disable dovecot for now"
+            if self.disable_mail
+            else "Start and enable Dovecot",
+            service="dovecot.service",
+            running=False if self.disable_mail else True,
+            enabled=False if self.disable_mail else True,
+            restarted=restart,
+        )
+        self.need_restart = False
+
+
+def _install_dovecot_package(package: str, arch: str):
+    arch = "amd64" if arch == "x86_64" else arch
+    arch = "arm64" if arch == "aarch64" else arch
+    url = f"https://download.delta.chat/dovecot/dovecot-{package}_2.3.21%2Bdfsg1-3_{arch}.deb"
+    deb_filename = "/root/" + url.split("/")[-1]
+
+    match (package, arch):
+        case ("core", "amd64"):
+            sha256 = "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d"
+        case ("core", "arm64"):
+            sha256 = "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9"
+        case ("imapd", "amd64"):
+            sha256 = "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86"
+        case ("imapd", "arm64"):
+            sha256 = "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f"
+        case ("lmtpd", "amd64"):
+            sha256 = "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab"
+        case ("lmtpd", "arm64"):
+            sha256 = "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f"
+        case _:
+            apt.packages(packages=[f"dovecot-{package}"])
+            return
+
+    files.download(
+        name=f"Download dovecot-{package}",
+        src=url,
+        dest=deb_filename,
+        sha256sum=sha256,
+        cache_time=60 * 60 * 24 * 365 * 10,  # never redownload the package
+    )
+
+    apt.deb(name=f"Install dovecot-{package}", src=deb_filename)
+
+
+def _configure_dovecot(config: Config, debug: bool = False) -> bool:
+    """Configures Dovecot IMAP server."""
+    need_restart = False
+
+    main_config = files.template(
+        src=get_resource("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=get_resource("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=get_resource("dovecot/push_notification.lua"),
+        dest="/etc/dovecot/push_notification.lua",
+        user="root",
+        group="root",
+        mode="644",
+    )
+    need_restart |= lua_push_notification_script.changed
+
+    # 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}"
+        if host.get_fact(Sysctl)[key] > 65535:
+            # Skip updating limits if already sufficient
+            # (enables running in incus containers where sysctl readonly)
+            continue
+        server.sysctl(
+            name=f"Change {key}",
+            key=key,
+            value=65535,
+            persist=True,
+        )
+
+    timezone_env = files.line(
+        name="Set TZ environment variable",
+        path="/etc/environment",
+        line="TZ=:/etc/localtime",
+    )
+    need_restart |= timezone_env.changed
+
+    return need_restart

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

@@ -113,7 +113,7 @@ mail_attribute_dict = proxy:/run/chatmail-metadata/metadata.socket:metadata
 # `imap_zlib` enables IMAP COMPRESS (RFC 4978).
 # <https://datatracker.ietf.org/doc/html/rfc4978.html>
 protocol imap {
-  mail_plugins = $mail_plugins imap_zlib imap_quota last_login
+  mail_plugins = $mail_plugins imap_quota last_login {% if config.imap_compress %}imap_zlib{% endif %}
   imap_metadata = yes
 }
 
@@ -252,3 +252,28 @@ protocol imap {
   rawlog_dir = %h 
 } 
 {% endif %}
+
+{% if not config.imap_compress %}
+# Hibernate IDLE users to save memory and CPU resources
+# NOTE: this will have no effect if imap_zlib plugin is used
+imap_hibernate_timeout = 30s
+service imap {
+  # Note that this change will allow any process running as
+  # $default_internal_user (dovecot) to access mails as any other user.
+  # This may be insecure in some installations, which is why this isn't
+  # done by default.
+  unix_listener imap-master {
+    user = $default_internal_user
+  }
+}
+# The following is the default already in v2.3.1+:
+service imap {
+  extra_groups = $default_internal_group
+}
+service imap-hibernate {
+  unix_listener imap-hibernate {
+    mode = 0660
+    group = $default_internal_group
+  }
+}
+{% endif %}

cmdeploy/src/cmdeploy/mtail/deployer.py

@@ -0,0 +1,68 @@
+from pyinfra import facts, host
+from pyinfra.operations import apt, files, server, systemd
+
+from cmdeploy.basedeploy import (
+    Deployer,
+    get_resource,
+)
+
+
+class MtailDeployer(Deployer):
+    def __init__(self, mtail_address):
+        self.mtail_address = mtail_address
+
+    def install(self):
+        # Uninstall mtail package to install a static binary.
+        apt.packages(name="Uninstall mtail", packages=["mtail"], present=False)
+
+        (url, sha256sum) = {
+            "x86_64": (
+                "https://github.com/google/mtail/releases/download/v3.0.8/mtail_3.0.8_linux_amd64.tar.gz",
+                "123c2ee5f48c3eff12ebccee38befd2233d715da736000ccde49e3d5607724e4",
+            ),
+            "aarch64": (
+                "https://github.com/google/mtail/releases/download/v3.0.8/mtail_3.0.8_linux_arm64.tar.gz",
+                "aa04811c0929b6754408676de520e050c45dddeb3401881888a092c9aea89cae",
+            ),
+        }[host.get_fact(facts.server.Arch)]
+
+        server.shell(
+            name="Download mtail",
+            commands=[
+                f"(echo '{sha256sum} /usr/local/bin/mtail' | sha256sum -c) || (curl -L {url} | gunzip | tar -x -f - mtail -O >/usr/local/bin/mtail.new && mv /usr/local/bin/mtail.new /usr/local/bin/mtail)",
+                "chmod 755 /usr/local/bin/mtail",
+            ],
+        )
+
+    def configure(self):
+        # 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=get_resource("mtail/mtail.service.j2"),
+            dest="/etc/systemd/system/mtail.service",
+            user="root",
+            group="root",
+            mode="644",
+            address=self.mtail_address or "127.0.0.1",
+            port=3903,
+        )
+
+        mtail_conf = files.put(
+            name="Mtail configuration",
+            src=get_resource("mtail/delivered_mail.mtail"),
+            dest="/etc/mtail/delivered_mail.mtail",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        self.need_restart = mtail_conf.changed
+
+    def activate(self):
+        systemd.service(
+            name="Start and enable mtail",
+            service="mtail.service",
+            running=bool(self.mtail_address),
+            enabled=bool(self.mtail_address),
+            restarted=self.need_restart,
+        )
+        self.need_restart = False

cmdeploy/src/cmdeploy/nginx/deployer.py

@@ -0,0 +1,117 @@
+from chatmaild.config import Config
+from pyinfra.operations import apt, files, systemd
+
+from cmdeploy.basedeploy import (
+    Deployer,
+    get_resource,
+)
+
+
+class NginxDeployer(Deployer):
+    def __init__(self, config):
+        self.config = config
+
+    def install(self):
+        #
+        # If we allow nginx to start up on install, it will grab port
+        # 80, which then will block acmetool from listening on the port.
+        # That in turn prevents getting certificates, which then causes
+        # an error when we try to start nginx on the custom config
+        # that leaves port 80 open but also requires certificates to
+        # be present.  To avoid getting into that interlocking mess,
+        # we use policy-rc.d to prevent nginx from starting up when it
+        # is installed.
+        #
+        # This approach allows us to avoid performing any explicit
+        # systemd operations during the install stage (as opposed to
+        # allowing it to start and then forcing it to stop), which allows
+        # the install stage to run in non-systemd environments like a
+        # container image build.
+        #
+        # For documentation about policy-rc.d, see:
+        # https://people.debian.org/~hmh/invokerc.d-policyrc.d-specification.txt
+        #
+        files.put(
+            src=get_resource("policy-rc.d"),
+            dest="/usr/sbin/policy-rc.d",
+            user="root",
+            group="root",
+            mode="755",
+        )
+
+        apt.packages(
+            name="Install nginx",
+            packages=["nginx", "libnginx-mod-stream"],
+        )
+
+        files.file("/usr/sbin/policy-rc.d", present=False)
+
+    def configure(self):
+        self.need_restart = _configure_nginx(self.config)
+
+    def activate(self):
+        systemd.service(
+            name="Start and enable nginx",
+            service="nginx.service",
+            running=True,
+            enabled=True,
+            restarted=self.need_restart,
+        )
+        self.need_restart = False
+
+
+def _configure_nginx(config: Config, debug: bool = False) -> bool:
+    """Configures nginx HTTP server."""
+    need_restart = False
+
+    main_config = files.template(
+        src=get_resource("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=get_resource("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=get_resource("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=get_resource("newemail.py", pkg="chatmaild").open("rb"),
+        dest=f"{cgi_dir}/newemail.py",
+        user="root",
+        group="root",
+        mode="755",
+    )
+
+    return need_restart

cmdeploy/src/cmdeploy/opendkim/deployer.py

@@ -0,0 +1,123 @@
+"""
+Installs OpenDKIM
+"""
+
+from pyinfra import host
+from pyinfra.facts.files import File
+from pyinfra.operations import apt, files, server, systemd
+
+from cmdeploy.basedeploy import Deployer, get_resource
+
+
+class OpendkimDeployer(Deployer):
+    required_users = [("opendkim", None, ["opendkim"])]
+
+    def __init__(self, mail_domain):
+        self.mail_domain = mail_domain
+
+    def install(self):
+        apt.packages(
+            name="apt install opendkim opendkim-tools",
+            packages=["opendkim", "opendkim-tools"],
+        )
+
+    def configure(self):
+        domain = self.mail_domain
+        dkim_selector = "opendkim"
+        """Configures OpenDKIM"""
+        need_restart = False
+
+        main_config = files.template(
+            src=get_resource("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=get_resource("opendkim/screen.lua"),
+            dest="/etc/opendkim/screen.lua",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        need_restart |= screen_script.changed
+
+        final_script = files.put(
+            src=get_resource("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=get_resource("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=get_resource("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,
+        )
+
+        if not host.get_fact(File, f"/etc/dkimkeys/{dkim_selector}.private"):
+            server.shell(
+                name="Generate OpenDKIM domain keys",
+                commands=[
+                    f"/usr/sbin/opendkim-genkey -D /etc/dkimkeys -d {domain} -s {dkim_selector}"
+                ],
+                _use_su_login=True,
+                _su_user="opendkim",
+            )
+
+        service_file = files.put(
+            name="Configure opendkim to restart once a day",
+            src=get_resource("opendkim/systemd.conf"),
+            dest="/etc/systemd/system/opendkim.service.d/10-prevent-memory-leak.conf",
+        )
+        need_restart |= service_file.changed
+
+        self.need_restart = need_restart
+
+    def activate(self):
+        systemd.service(
+            name="Start and enable OpenDKIM",
+            service="opendkim.service",
+            running=True,
+            enabled=True,
+            daemon_reload=self.need_restart,
+            restarted=self.need_restart,
+        )
+        self.need_restart = False

cmdeploy/src/cmdeploy/opendkim/final.lua

@@ -9,9 +9,10 @@ if nsigs == nil then
 	return nil
 end
 
+local valid = false
 for i = 1, nsigs do
-        sig = odkim.get_sighandle(ctx, i - 1)
-        sigres = odkim.sig_result(sig)
+	sig = odkim.get_sighandle(ctx, i - 1)
+	sigres = odkim.sig_result(sig)
 
 	-- All signatures that do not correspond to From: 
 	-- were ignored in screen.lua and return sigres -1.
@@ -19,10 +20,19 @@ for i = 1, nsigs do
 	-- Any valid signature that was not ignored like this
 	-- means the message is acceptable.
 	if sigres == 0 then
-		return nil
-	end	
+		valid = true
+	end
+end
+
+if valid then
+	-- Strip all DKIM-Signature headers after successful validation
+	-- Delete in reverse order to avoid index shifting.
+	for i = nsigs, 1, -1 do
+		odkim.del_header(ctx, "DKIM-Signature", i)
+	end
+else
+	odkim.set_reply(ctx, "554", "5.7.1", "No valid DKIM signature found")
+	odkim.set_result(ctx, SMFIS_REJECT)
 end
 
-odkim.set_reply(ctx, "554", "5.7.1", "No valid DKIM signature found")
-odkim.set_result(ctx, SMFIS_REJECT)
 return nil

cmdeploy/src/cmdeploy/postfix/deployer.py

@@ -0,0 +1,77 @@
+from pyinfra.operations import apt, files, systemd
+
+from cmdeploy.basedeploy import Deployer, get_resource
+
+
+class PostfixDeployer(Deployer):
+    required_users = [("postfix", None, ["opendkim"])]
+
+    def __init__(self, config, disable_mail):
+        self.config = config
+        self.disable_mail = disable_mail
+
+    def install(self):
+        apt.packages(
+            name="Install Postfix",
+            packages="postfix",
+        )
+
+    def configure(self):
+        config = self.config
+        need_restart = False
+
+        main_config = files.template(
+            src=get_resource("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=get_resource("postfix/master.cf.j2"),
+            dest="/etc/postfix/master.cf",
+            user="root",
+            group="root",
+            mode="644",
+            debug=False,
+            config=config,
+        )
+        need_restart |= master_config.changed
+
+        header_cleanup = files.put(
+            src=get_resource("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=get_resource("postfix/login_map"),
+            dest="/etc/postfix/login_map",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        need_restart |= login_map.changed
+        self.need_restart = need_restart
+
+    def activate(self):
+        restart = False if self.disable_mail else self.need_restart
+
+        systemd.service(
+            name="disable postfix for now"
+            if self.disable_mail
+            else "Start and enable Postfix",
+            service="postfix.service",
+            running=False if self.disable_mail else True,
+            enabled=False if self.disable_mail else True,
+            restarted=restart,
+        )
+        self.need_restart = False

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

@@ -27,7 +27,7 @@ smtp_tls_servername = hostname
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtp_tls_policy_maps = inline:{nauta.cu=may}
 smtp_tls_protocols = >=TLSv1.2
-smtpd_tls_protocols = >=TLSv1.2
+smtp_tls_mandatory_protocols = >=TLSv1.2
 
 # Disable anonymous cipher suites
 # and known insecure algorithms.

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

@@ -15,6 +15,7 @@ smtp      inet  n       -       y       -       -       smtpd -v
 smtp      inet  n       -       y       -       -       smtpd 
 {%- endif %}
   -o smtpd_tls_security_level=encrypt
+  -o smtpd_tls_mandatory_protocols=>=TLSv1.2
   -o smtpd_proxy_filter=127.0.0.1:{{ config.filtermail_smtp_port_incoming }}
 submission inet n       -       y       -       5000    smtpd
   -o syslog_name=postfix/submission

cmdeploy/src/cmdeploy/remote/rdns.py

@@ -37,7 +37,10 @@ def perform_initial_checks(mail_domain, pre_command=""):
         return res
 
     # parse out sts-id if exists, example: "v=STSv1; id=2090123"
-    parts = query_dns("TXT", f"_mta-sts.{mail_domain}").split("id=")
+    mta_sts_txt = query_dns("TXT", f"_mta-sts.{mail_domain}")
+    if not mta_sts_txt:
+        return res
+    parts = mta_sts_txt.split("id=")
     res["sts_id"] = parts[1].rstrip('"') if len(parts) == 2 else ""
     return res
 

cmdeploy/src/cmdeploy/service/echobot.service.f

@@ -1,67 +0,0 @@
-[Unit]
-Description=Chatmail echo bot for testing it works
-
-[Service]
-ExecStart={execpath} {config_path}
-Environment="PATH={remote_venv_dir}:$PATH"
-Restart=always
-RestartSec=30
-
-User=echobot
-Group=echobot
-
-# Create /var/lib/echobot
-StateDirectory=echobot
-
-# Create /run/echobot
-#
-# echobot stores /run/echobot/password
-# with a password there, which doveauth then reads.
-RuntimeDirectory=echobot
-
-WorkingDirectory=/var/lib/echobot
-
-# Apply security restrictions suggested by
-#   systemd-analyze security echobot.service
-CapabilityBoundingSet=
-LockPersonality=true
-MemoryDenyWriteExecute=true
-NoNewPrivileges=true
-PrivateDevices=true
-PrivateMounts=true
-PrivateTmp=true
-
-# We need to know about doveauth user to give it access to /run/echobot/password
-PrivateUsers=false
-
-ProtectClock=true
-ProtectControlGroups=true
-ProtectHostname=true
-ProtectKernelLogs=true
-ProtectKernelModules=true
-ProtectKernelTunables=true
-ProtectProc=noaccess
-
-# Should be "strict", but we currently write /accounts folder in a protected path
-ProtectSystem=full
-
-RemoveIPC=true
-RestrictAddressFamilies=AF_INET AF_INET6
-RestrictNamespaces=true
-RestrictRealtime=true
-RestrictSUIDSGID=true
-SystemCallArchitectures=native
-SystemCallFilter=~@clock
-SystemCallFilter=~@cpu-emulation
-SystemCallFilter=~@debug
-SystemCallFilter=~@module
-SystemCallFilter=~@mount
-SystemCallFilter=~@obsolete
-SystemCallFilter=~@raw-io
-SystemCallFilter=~@reboot
-SystemCallFilter=~@resources
-SystemCallFilter=~@swap
-UMask=0077
-
-[Install]
-WantedBy=multi-user.target

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

@@ -1,5 +1,4 @@
 import datetime
-import os
 import smtplib
 import socket
 import subprocess
@@ -8,7 +7,6 @@ import time
 import pytest
 
 from cmdeploy import remote
-from cmdeploy.cmdeploy import main
 from cmdeploy.sshexec import SSHExec
 
 
@@ -70,47 +68,6 @@ class TestSSHExecutor:
         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)

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

@@ -160,22 +160,3 @@ def test_hide_senders_ip_address(cmfactory):
     user2.direct_imap.select_folder("Inbox")
     msg = user2.direct_imap.get_all_messages()[0]
     assert public_ip not in msg.obj.as_string()
-
-
-def test_echobot(cmfactory, chatmail_config, lp, sshdomain):
-    ac = cmfactory.get_online_accounts(1)[0]
-
-    # establish contact with echobot
-    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")
-    reply = ac._evtracker.wait_next_incoming_message()
-    assert reply.text == text

cmdeploy/src/cmdeploy/tests/online/test_3_status.py

@@ -0,0 +1,49 @@
+import os
+
+from cmdeploy.cmdeploy import main
+
+
+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)
+
+    assert len(status_out.out.splitlines()) > 5
+
+    """
+    don't test actual server state:
+
+    services = [
+        "acmetool-redirector",
+        "chatmail-metadata",
+        "doveauth",
+        "dovecot",
+        "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 == []
+    """

cmdeploy/src/cmdeploy/www.py

@@ -140,34 +140,34 @@ def main():
     config.webdev = True
     assert config.mail_domain
 
-    # start web page generation, open a browser and wait for changes
     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")
-    print(f"watching {src_path} directory for changes")
+    print(f"Watching {src_path} directory for changes...")
 
+    stats = snapshot_dir_stats(src_path)
     changenum = 0
-    count = 0
+    debounce_time = 0.5  # wait 0.5s after detecting a change
+
     while True:
+        time.sleep(1)
         newstats = snapshot_dir_stats(src_path)
-        if newstats == stats and count % 60 != 0:
-            count += 1
-            time.sleep(1.0)
-            continue
 
-        for key in newstats:
-            if stats[key] != newstats[key]:
-                print(f"*** CHANGED: {key}")
-                changenum += 1
+        if newstats != stats:
+            changed_files = [f for f in newstats if stats.get(f) != newstats[f]]
+            for f in changed_files:
+                print(f"*** CHANGED: {f}")
 
-        stats = newstats
-        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
+            stats = newstats
+            changenum += 1
+            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")
+
+            time.sleep(debounce_time)  # simple debounce
 
 
 if __name__ == "__main__":

doc/source/migrate.rst

@@ -26,7 +26,7 @@ this case, just run ``ssh-keygen -R "mail.example.org"`` as recommended.
    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
+   ``/etc/dkimkeys``, 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:
@@ -34,11 +34,11 @@ this case, just run ``ssh-keygen -R "mail.example.org"`` as recommended.
    ::
 
        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 /"
+       tar c - /home/vmail/mail /var/lib/acme /etc/dkimkeys /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
+   This transfers all addresses, the TLS certificate,
+   and DKIM keys (so DKIM DNS record remains valid).
+   It also preserves the Postfix mail spool so any messages
    pending delivery will still be delivered.
 
 3. Install chatmail on the new machine:
@@ -58,7 +58,6 @@ this case, just run ``ssh-keygen -R "mail.example.org"`` as recommended.
        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.
 

doc/source/overview.rst

@@ -109,10 +109,6 @@ short overview of ``chatmaild`` services:
    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``.
@@ -203,44 +199,6 @@ Message between users on the same relay
         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
 ----------------------------------------
 
@@ -311,9 +269,11 @@ 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``).
+corresponds 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.
+After validating the DKIM signature,
+the `final.lua` script strips all ``OpenDKIM:`` headers to reduce message size on disc.
 
 Note that chatmail relays
 

doc/source/proxy.rst

@@ -22,7 +22,12 @@ 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
+chatmail relay, follow these instructions:
+
+Linux
+^^^^^
+
+Put the following configuration in
 ``/etc/nftables.conf``:
 
 ::
@@ -110,5 +115,61 @@ Uncomment in ``/etc/sysctl.conf`` the following two lines:
 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.
+FreeBSD / pf
+^^^^^^^^^^^^
 
+Put the following configuration in
+``/etc/pf.conf``:
+
+::
+
+    ext_if = "em0"
+    forward_ports = "{ 25, 80, 143, 443, 465, 587, 993 }"
+    chatmail_ipv4 = "AAA.BBB.CCC.DDD"
+    icmp_types = "{ echoreq, echorep, unreach, timex }"
+    chatmail_ipv6 = "XXX::1"
+    icmp6_types = "{ echorep, echoreq, neighbradv, neighbrsol, routeradv, routersol, unreach, toobig, timex }"
+
+    set skip on lo0
+
+    nat on $ext_if inet from any to any -> ($ext_if:0)
+    nat on $ext_if inet6 from any to any -> ($ext_if:0)
+
+    # Define the redirect rules
+    rdr on $ext_if inet proto tcp from any to ($ext_if:0) port $forward_ports -> $chatmail_ipv4
+    rdr on $ext_if inet6 proto tcp from any to ($ext_if:0) port $forward_ports -> $chatmail_ipv6
+
+    # Accept the incoming traffic to the specified ports we will NAT redirect
+    pass in quick on $ext_if inet proto tcp from any to any port $forward_ports flags S/SA modulate state
+    pass in quick on $ext_if inet6 proto tcp from any to any port $forward_ports flags S/SA modulate state
+
+    # Allow incoming SSH for host mgmt
+    pass in quick on $ext_if proto tcp from any to ($ext_if) port 22 flags S/SA modulate state
+
+    # Allow ICMP
+    pass in quick on $ext_if inet proto icmp all icmp-type $icmp_types keep state
+    pass in quick on $ext_if inet6 proto ipv6-icmp all icmp6-type $icmp6_types keep state
+
+    # Allow traffic from anyone to go through the NAT
+    pass on $ext_if inet proto tcp from any to $chatmail_ipv4 flags S/SA modulate state
+    pass on $ext_if inet6 proto tcp from any to $chatmail_ipv6 flags S/SA modulate state
+
+    # Default allow out
+    pass out quick on $ext_if from any to any
+
+    # Default block
+    block drop in log all
+
+Insert into ``/etc/sysctl.conf.local`` the following two lines:
+
+::
+
+    net.inet.ip.forwarding=1
+    net.inet6.ip6.forwarding=1
+
+Activate the sysctls with ``service sysctl onestart``.
+Enable the pf firewall with ``service pf enable``.
+Apply the firewall rules with ``service pf start`` or ``pfctl -f /etc/pf.conf``.
+Note, enabling the firewall may interrupt your SSH session, but you can reconnect.
+
+Once proxy relay is set up, you can add its IP address to the DNS.

www/src/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /