feat: metadata service: make turnserver socket path configurable

2026-06-09 21:21:09 +00:00 · 2026-05-12 11:34:41 -07:00
28 changed files with 307 additions and 424 deletions
@@ -20,9 +20,9 @@ concurrency:
 jobs:
  no-dns:
    name: LXC deploy and test
-    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@main
+    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@v0.14.6
    with:
-      cmlxc_version: main
+      cmlxc_version: v0.14.6
      cmlxc_commands: |
        cmlxc init 
        # single cmdeploy relay test
@@ -29,7 +29,7 @@ jobs:
          ref: ${{ github.event.pull_request.head.sha }}
          persist-credentials: false
      - name: download filtermail
-        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.7.0/filtermail-x86_64 -o /usr/local/bin/filtermail && chmod +x /usr/local/bin/filtermail
+        run: curl -L https://github.com/chatmail/filtermail/releases/download/v0.6.6/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
@@ -57,9 +57,9 @@ jobs:

  lxc-test:
    name: LXC deploy and test
-    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@main
+    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@v0.14.6
    with:
-      cmlxc_version: main
+      cmlxc_version: v0.14.6
      cmlxc_commands: |
        cmlxc init 
        # single cmdeploy relay test
@@ -8,8 +8,7 @@ name: Trigger Docker build

 on:
  push:
-    branches: [main, j4n/dovecot-multidist]
-    tags: ['[0-9]+.[0-9]+.[0-9]+']
+    branches: [main]
  workflow_dispatch:

 permissions: {}
@@ -1,46 +1,4 @@
-# Changelog for chatmail deployment
-
-## [1.11.0] - 2026-05-15
-
-### Breaking Changes
-
- [**breaking**] Drop passthrough_sender and passthrough_recipients chatmail.ini options to eliminate one more source of unencrypted messages
-
-### Features
-
- Use filtermail for delivery to remote MTAs
- Expose metadata "maxsmtprecipients" value
- Support setup without domain, with only an IPv4 address (#963)
- *(doc/docker)* Introduce docker images in documentation
- DKIM-sign bounce messages (mainly "user does not exist")
- *(config)* Load default values from Config(), not chatmail.ini.f (#853)
- Make turn_socket_path configurable, and cleanup tests and turnserver code.
- Warn about any unused chatmail.ini parameter at the end of "cmdeploy run"
-
-### Bug Fixes
-
- Make www tests work with editable instead of just plain installs
- Use path with no leading slash for mxdeliv
- Increase filtermail-transport concurrency limit
- Fix #972 by increasing file descriptors for filtermail
- *(mtail)* Correct boot ordering and deploy restart logic
- *(cmdeploy)* Stop and disable unbound-resolvconf
- *(nginx)* Properly redirect www to mail_domain
- *(dns)* Query correct NS if MNAME server is hidden (#954)
- Legacy token metadata storage used list type, but if no new setmetadata happened, the user would not be notified at all.
- *(logging)* Log all http requests to syslog
-
-### Documentation
-
- Document how to upgrade to new version (#965)
-
-### Other
-
- *(deps)* Upgrade to filtermail v0.6.4
-
-### Refactor
-
- Introduce automated change-tracking across deployers
+# Changelog for chatmail deployment 

 ## 1.10.0 2026-04-30

@@ -10,6 +10,7 @@ dependencies = [
  "filelock",
  "requests",
  "crypt-r >= 3.13.1 ; python_version >= '3.11'",
+  "domain-validator",
 ]

 [tool.setuptools]
@@ -25,6 +26,7 @@ chatmail-expire = "chatmaild.expire:daily_expire_main"
 chatmail-quota-expire = "chatmaild.expire:quota_expire_main"
 chatmail-fsreport = "chatmaild.fsreport:main"
 lastlogin = "chatmaild.lastlogin:main"
+turnserver = "chatmaild.turnserver:main"

 [project.entry-points.pytest11]
 "chatmaild.testplugin" = "chatmaild.tests.plugin"
@@ -2,6 +2,7 @@ import ipaddress
 from pathlib import Path

 import iniconfig
+from domain_validator import DomainValidator

 from chatmaild.user import User

@@ -9,14 +10,18 @@ from chatmaild.user import User
 def read_config(inipath):
    assert Path(inipath).exists(), inipath
    cfg = iniconfig.IniConfig(inipath)
-    return Config(inipath, params=cfg.sections["params"])
+    params = cfg.sections["params"]
+    default_config_content = get_default_config_content(params["mail_domain"])
+    df_params = iniconfig.IniConfig("ini", data=default_config_content)["params"]
+    new_params = dict(df_params.items())
+    new_params.update(params)
+    return Config(inipath, params=new_params)


 class Config:
    def __init__(self, inipath, params):
        self._inipath = inipath
-        params = dict(params)
-        raw_domain = params.pop("mail_domain")
+        raw_domain = params["mail_domain"]
        self.mail_domain_bare = raw_domain

        if is_valid_ipv4(raw_domain):
@@ -24,63 +29,61 @@ class Config:
            self.mail_domain = f"[{raw_domain}]"
            self.postfix_myhostname = ipaddress.IPv4Address(raw_domain).reverse_pointer
        else:
+            DomainValidator().validate_domain_re(raw_domain)
            self.ipv4_relay = None
            self.mail_domain = raw_domain
            self.postfix_myhostname = raw_domain

-        self.max_user_send_per_minute = int(params.pop("max_user_send_per_minute", 60))
-        self.max_user_send_burst_size = int(params.pop("max_user_send_burst_size", 10))
-        self.max_mailbox_size = params.pop("max_mailbox_size", "500M")
-        self.max_message_size = int(params.pop("max_message_size", 31457280))
-        self.delete_mails_after = params.pop("delete_mails_after", "20")
-        self.delete_large_after = params.pop("delete_large_after", "7")
-        self.delete_inactive_users_after = int(
-            params.pop("delete_inactive_users_after", 90)
-        )
-        self.username_min_length = int(params.pop("username_min_length", 9))
-        self.username_max_length = int(params.pop("username_max_length", 9))
-        self.password_min_length = int(params.pop("password_min_length", 9))
-        self.www_folder = params.pop("www_folder", "")
-        self.filtermail_smtp_port = int(params.pop("filtermail_smtp_port", "10080"))
+        self.max_user_send_per_minute = int(params.get("max_user_send_per_minute", 60))
+        self.max_user_send_burst_size = int(params.get("max_user_send_burst_size", 10))
+        self.max_mailbox_size = params["max_mailbox_size"]
+        self.max_message_size = int(params.get("max_message_size", "31457280"))
+        self.delete_mails_after = params["delete_mails_after"]
+        self.delete_large_after = params["delete_large_after"]
+        self.delete_inactive_users_after = int(params["delete_inactive_users_after"])
+        self.username_min_length = int(params["username_min_length"])
+        self.username_max_length = int(params["username_max_length"])
+        self.password_min_length = int(params["password_min_length"])
+        self.passthrough_senders = params["passthrough_senders"].split()
+        self.passthrough_recipients = params["passthrough_recipients"].split()
+        self.www_folder = params.get("www_folder", "")
+        self.filtermail_smtp_port = int(params.get("filtermail_smtp_port", "10080"))
        self.filtermail_smtp_port_incoming = int(
-            params.pop("filtermail_smtp_port_incoming", "10081")
+            params.get("filtermail_smtp_port_incoming", "10081")
        )
        self.filtermail_http_port_incoming = int(
-            params.pop("filtermail_http_port_incoming", "10082")
+            params.get("filtermail_http_port_incoming", "10082")
        )
        self.filtermail_lmtp_port_transport = int(
-            params.pop("filtermail_lmtp_port_transport", "10083")
+            params.get("filtermail_lmtp_port_transport", "10083")
        )
-        self.postfix_reinject_port = int(params.pop("postfix_reinject_port", "10025"))
+        self.postfix_reinject_port = int(params.get("postfix_reinject_port", "10025"))
        self.postfix_reinject_port_incoming = int(
-            params.pop("postfix_reinject_port_incoming", "10026")
+            params.get("postfix_reinject_port_incoming", "10026")
        )
-        self.mtail_address = params.pop("mtail_address", None)
-        self.disable_ipv6 = params.pop("disable_ipv6", "false").lower() == "true"
-        self.acme_email = params.pop("acme_email", "")
-        self.imap_rawlog = params.pop("imap_rawlog", "false").lower() == "true"
-        self.imap_compress = params.pop("imap_compress", "false").lower() == "true"
-        self.turn_socket_path = params.pop(
-            "turn_socket_path", "/run/chatmail-turn/turn.socket"
-        )
-        iroh_relay = params.pop("iroh_relay", None)
-        if iroh_relay is None:
+        self.mtail_address = params.get("mtail_address")
+        self.disable_ipv6 = params.get("disable_ipv6", "false").lower() == "true"
+        self.acme_email = params.get("acme_email", "")
+        self.imap_rawlog = params.get("imap_rawlog", "false").lower() == "true"
+        self.imap_compress = params.get("imap_compress", "false").lower() == "true"
+        self.turn_socket_path = params.get("turn_socket_path", "/run/chatmail-turn/turn.socket")
+        if "iroh_relay" not in params:
            self.iroh_relay = "https://" + raw_domain
            self.enable_iroh_relay = True
        else:
-            self.iroh_relay = iroh_relay.strip()
+            self.iroh_relay = params["iroh_relay"].strip()
            self.enable_iroh_relay = False
-        self.privacy_postal = params.pop("privacy_postal", None)
-        self.privacy_mail = params.pop("privacy_mail", None)
-        self.privacy_pdo = params.pop("privacy_pdo", None)
-        self.privacy_supervisor = params.pop("privacy_supervisor", None)
+        self.privacy_postal = params.get("privacy_postal")
+        self.privacy_mail = params.get("privacy_mail")
+        self.privacy_pdo = params.get("privacy_pdo")
+        self.privacy_supervisor = params.get("privacy_supervisor")

        # TLS certificate management.
        # If tls_external_cert_and_key is set, use externally managed certs.
        # Otherwise derived from the domain name:
        # - Domains starting with "_" use self-signed certificates
        # - All other domains use ACME.
-        external = params.pop("tls_external_cert_and_key", "").strip()
+        external = params.get("tls_external_cert_and_key", "").strip()

        if external:
            parts = external.split()
@@ -101,12 +104,11 @@ class Config:
            self.tls_key_path = f"/var/lib/acme/live/{raw_domain}/privkey"

        # deprecated option
-        mbdir = params.pop("mailboxes_dir", f"/home/vmail/mail/{raw_domain}")
+        mbdir = params.get("mailboxes_dir", f"/home/vmail/mail/{raw_domain}")
        self.mailboxes_dir = Path(mbdir.strip())

        # old unused option (except for first migration from sqlite to maildir store)
-        self.passdb_path = Path(params.pop("passdb_path", "/home/vmail/passdb.sqlite"))
-        self._unused_keys = list(params)
+        self.passdb_path = Path(params.get("passdb_path", "/home/vmail/passdb.sqlite"))

    @property
    def max_mailbox_size_mb(self):
@@ -163,7 +165,31 @@ def get_default_config_content(mail_domain, **overrides):
    for name, value in extra.items():
        new_line = f"{name} = {value}"
        new_lines.append(new_line)
-    return "\n".join(new_lines)
+
+    content = "\n".join(new_lines)
+
+    # apply testrun privacy overrides
+
+    if mail_domain.endswith(".testrun.org"):
+        override_inipath = inidir.joinpath("override-testrun.ini")
+        privacy = iniconfig.IniConfig(override_inipath)["privacy"]
+        lines = []
+        for line in content.split("\n"):
+            for key, value in privacy.items():
+                value_lines = value.format(mail_domain=mail_domain).strip().split("\n")
+                if not line.startswith(f"{key} =") or not value_lines:
+                    continue
+                if len(value_lines) == 1:
+                    lines.append(f"{key} = {value}")
+                else:
+                    lines.append(f"{key} =")
+                    for vl in value_lines:
+                        lines.append(f"    {vl}")
+                break
+            else:
+                lines.append(line)
+        content = "\n".join(lines)
+    return content


 def is_valid_ipv4(address: str) -> bool:
@@ -168,16 +168,6 @@ class Expiry:
        if mbox.last_login and mbox.last_login < cutoff_without_login:
            self.remove_mailbox(mbox.basedir)
            return
-        elif mbox.last_login is None:
-            try:
-                if not self.dry:
-                    os.rmdir(mbox.basedir)
-                    self.del_mboxes += 1
-            except OSError:
-                print_info(
-                    f"Skipped deleting {mbox.basedir}, doesn't have last_login but isn't empty"
-                )
-            return

        mboxname = os.path.basename(mbox.basedir)
        if self.verbose:
@@ -12,35 +12,42 @@ mail_domain = {mail_domain}
 #

 # email sending rate per user and minute
-#max_user_send_per_minute = 60
+max_user_send_per_minute = 60

 # per-user max burst size for sending rate limiting (GCRA bucket capacity)
-#max_user_send_burst_size = 10
+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
+# Oldest messages will be removed automatically, so mailboxes never run full.
+max_mailbox_size = 500M

 # maximum message size for an e-mail in bytes
-#max_message_size = 31457280
+max_message_size = 31457280

 # days after which mails are unconditionally deleted
-#delete_mails_after = 20
+delete_mails_after = 20

 # days after which large messages (>200k) are unconditionally deleted
-#delete_large_after = 7
+delete_large_after = 7

 # days after which users without a successful login are deleted (database and mails)
-#delete_inactive_users_after = 90
+delete_inactive_users_after = 90

 # minimum length a username must have
-#username_min_length = 9
+username_min_length = 9

 # maximum length a username can have
-#username_max_length = 9
+username_max_length = 9

 # minimum length a password must have
-#password_min_length = 9
+password_min_length = 9
+
+# list of chatmail addresses which can send outbound un-encrypted mail
+passthrough_senders =
+
+# list of e-mail recipients for which to accept outbound un-encrypted mails
+# (space-separated, item may start with "@" to whitelist whole recipient domains)
+passthrough_recipients =

 # Use externally managed TLS certificates instead of built-in acmetool.
 # Paths refer to files on the deployment server (not the build machine).
@@ -56,11 +63,22 @@ mail_domain = {mail_domain}
 # Deployment Details
 #

+# Path to the TURN server Unix socket
+turn_socket_path = /run/chatmail-turn/turn.socket
+
+# SMTP outgoing filtermail and reinjection
+filtermail_smtp_port = 10080
+postfix_reinject_port = 10025
+
+# SMTP incoming filtermail and reinjection 
+filtermail_smtp_port_incoming = 10081
+postfix_reinject_port_incoming = 10026
+
 # if set to "True" IPv6 is disabled
-#disable_ipv6 = False
+disable_ipv6 = False

 # Your email adress, which will be used in acmetool to manage Let's Encrypt SSL certificates
-#acme_email =
+acme_email = 

 # Defaults to https://iroh.{{mail_domain}} and running `iroh-relay` on the chatmail
 # service.
@@ -93,13 +111,13 @@ mail_domain = {mail_domain}
 # in per-maildir ".in/.out" files. 
 # Note that you need to manually cleanup these files
 # so use this option with caution on production servers. 
-#imap_rawlog = false
+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
+imap_compress = false


 #
@@ -0,0 +1,16 @@
+
+[privacy]
+
+passthrough_recipients = privacy@testrun.org echo@{mail_domain}
+
+privacy_postal =
+    Merlinux GmbH, Represented by the managing director H. Krekel,
+    Reichgrafen Str. 20, 79102 Freiburg, Germany
+
+privacy_mail = privacy@testrun.org
+privacy_pdo =
+    Prof. Dr. Fabian Schmieder, lexICT UG (limited), Ostfeldstr. 49, 30559 Hannover.
+    You can contact him at *delta-privacy@merlinux.eu* (Keyword: DPO)
+privacy_supervisor =
+    State Commissioner for Data Protection and Freedom of Information of
+    Baden-Württemberg in 70173 Stuttgart, Germany.
@@ -1,5 +1,4 @@
 import logging
-import socket
 import sys
 import time
 from contextlib import contextmanager
@@ -8,14 +7,7 @@ from .config import read_config
 from .dictproxy import DictProxy
 from .filedict import FileDict
 from .notifier import Notifier
-
-
-def turn_credentials(turn_socket_path):
-    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as client_socket:
-        client_socket.settimeout(5)
-        client_socket.connect(turn_socket_path)
-        with client_socket.makefile("rb") as file:
-            return file.readline().decode("utf-8").strip()
+from .turnserver import turn_credentials


 def _is_valid_token_timestamp(timestamp, now):
@@ -87,14 +79,7 @@ class Metadata:


 class MetadataDictProxy(DictProxy):
-    def __init__(
-        self,
-        notifier,
-        metadata,
-        iroh_relay=None,
-        turn_hostname=None,
-        turn_socket_path=None,
-    ):
+    def __init__(self, notifier, metadata, iroh_relay=None, turn_hostname=None, turn_socket_path=None):
        super().__init__()
        self.notifier = notifier
        self.metadata = metadata
@@ -13,12 +13,7 @@ def test_read_config_basic(example_config):
    assert not example_config.privacy_pdo and not example_config.privacy_postal

    inipath = example_config._inipath
-    inipath.write_text(
-        inipath.read_text().replace(
-            "#max_user_send_per_minute = 60",
-            "max_user_send_per_minute = 37",
-        )
-    )
+    inipath.write_text(inipath.read_text().replace("60", "37"))
    example_config = read_config(inipath)
    assert example_config.max_user_send_per_minute == 37
    assert example_config.mail_domain == "chat.example.org"
@@ -36,21 +31,26 @@ def test_read_config_basic_using_defaults(tmp_path, maildomain):
    example_config = read_config(inipath)
    assert example_config.max_user_send_per_minute == 60
    assert example_config.filtermail_smtp_port_incoming == 10081
-    assert example_config.filtermail_smtp_port == 10080
-    assert example_config.postfix_reinject_port == 10025
-    assert example_config.max_user_send_per_minute == 60
-    assert example_config.max_mailbox_size == "500M"
-    assert example_config.delete_mails_after == "20"
-    assert example_config.delete_large_after == "7"
-    assert example_config.username_min_length == 9
-    assert example_config.username_max_length == 9
-    assert example_config.password_min_length == 9
-    assert example_config._unused_keys == []


-def test_config_unused_keys(make_config):
-    config = make_config("chat.example.org", {"passthrough_senders": "x@y.org"})
-    assert config._unused_keys == ["passthrough_senders"]
+def test_read_config_testrun(make_config):
+    config = make_config("something.testrun.org")
+    assert config.mail_domain == "something.testrun.org"
+    assert len(config.privacy_postal.split("\n")) > 1
+    assert len(config.privacy_supervisor.split("\n")) > 1
+    assert len(config.privacy_pdo.split("\n")) > 1
+    assert config.privacy_mail == "privacy@testrun.org"
+    assert config.filtermail_smtp_port == 10080
+    assert config.postfix_reinject_port == 10025
+    assert config.max_user_send_per_minute == 60
+    assert config.max_mailbox_size == "500M"
+    assert config.delete_mails_after == "20"
+    assert config.delete_large_after == "7"
+    assert config.username_min_length == 9
+    assert config.username_max_length == 9
+    assert config.password_min_length == 9
+    assert "privacy@testrun.org" in config.passthrough_recipients
+    assert config.passthrough_senders == []


 def test_config_userstate_paths(make_config, tmp_path):
@@ -1,7 +1,6 @@
 import itertools
 import os
 import random
-import shutil
 import time
 from datetime import datetime
 from fnmatch import fnmatch
@@ -10,7 +9,6 @@ from pathlib import Path
 import pytest

 from chatmaild.expire import (
-    Expiry,
    FileEntry,
    MailboxStat,
    expire_to_target,
@@ -106,32 +104,6 @@ def test_stats_mailbox(mbox1):
    assert mbox3.last_login is None


-def test_mbox_without_password(mbox1, example_config, capsys):
-    password = Path(mbox1.basedir).joinpath("password")
-    os.remove(password)
-    mbox_rescan = MailboxStat(mbox1.basedir)
-    assert mbox_rescan.last_login is None
-
-    exp = Expiry(
-        example_config, dry=False, now=datetime.now().timestamp(), verbose=False
-    )
-    exp.process_mailbox_stat(mbox_rescan)
-    out, err = capsys.readouterr()
-    assert "doesn't have last_login but isn't empty" in err
-    assert os.path.isdir(mbox_rescan.basedir)
-
-    for entry in os.scandir(mbox_rescan.basedir):
-        if os.path.isdir(entry):
-            shutil.rmtree(entry)
-        else:
-            os.remove(entry)
-
-    exp.process_mailbox_stat(mbox_rescan)
-    out, err = capsys.readouterr()
-    assert "doesn't have last_login but isn't empty" not in err
-    assert not os.path.isdir(mbox_rescan.basedir)
-
-
 def test_report_no_mailboxes(example_config):
    args = (str(example_config._inipath),)
    report_main(args)
@@ -324,7 +324,7 @@ def test_turn_credentials_exception_returns_N(notifier, metadata, monkeypatch):
        turn_hostname="turn.example.org",
    )

-    def mock_turn_credentials(turn_socket_path):
+    def mock_turn_credentials():
        raise ConnectionRefusedError("socket not available")

    monkeypatch.setattr(chatmaild.metadata, "turn_credentials", mock_turn_credentials)
@@ -348,9 +348,7 @@ def test_turn_credentials_success(notifier, metadata, monkeypatch):
        turn_hostname="turn.example.org",
    )

-    monkeypatch.setattr(
-        chatmaild.metadata, "turn_credentials", lambda path: "user:pass"
-    )
+    monkeypatch.setattr(chatmaild.metadata, "turn_credentials", lambda: "user:pass")

    transactions = {}
    res = dictproxy.handle_dovecot_request(
@@ -1,46 +0,0 @@
-import socket
-import threading
-
-import pytest
-
-from chatmaild.metadata import turn_credentials
-
-
-@pytest.fixture
-def turn_socket(tmp_path):
-    sock_path = str(tmp_path / "turn.socket")
-    server = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-    server.bind(sock_path)
-    server.listen(1)
-    yield sock_path, server
-    server.close()
-
-
-def test_turn_credentials_timeout(turn_socket):
-    sock_path, server = turn_socket
-    with pytest.raises(socket.timeout):
-        # Inside turn_credentials the kernel listen backlog (1)
-        # completes connect() without accept()
-        # so the client blocks on readline() until the 5s timeout fires.
-        turn_credentials(sock_path)
-
-
-def test_turn_credentials_connection_refused_on_not_existing_socket(tmp_path):
-    missing = str(tmp_path / "nonexistent.socket")
-    with pytest.raises((ConnectionRefusedError, FileNotFoundError)):
-        turn_credentials(missing)
-
-
-def test_turn_credentials_socket_success(turn_socket):
-    sock_path, server = turn_socket
-
-    def respond():
-        conn, _ = server.accept()
-        conn.sendall(b"testuser:testpass\n")
-        conn.close()
-
-    t = threading.Thread(target=respond, daemon=True)
-    t.start()
-
-    result = turn_credentials(sock_path)
-    assert result == "testuser:testpass"
@@ -0,0 +1,73 @@
+import socket
+import threading
+import time
+from unittest.mock import patch
+
+import pytest
+
+from chatmaild.turnserver import turn_credentials
+
+SOCKET_PATH = "/run/chatmail-turn/turn.socket"
+
+
+@pytest.fixture
+def turn_socket(tmp_path):
+    """Create a real Unix socket server at a temp path."""
+    sock_path = str(tmp_path / "turn.socket")
+    server = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+    server.bind(sock_path)
+    server.listen(1)
+    yield sock_path, server
+    server.close()
+
+
+def _call_turn_credentials(sock_path):
+    """Call turn_credentials but connect to sock_path instead of hardcoded path."""
+    original_connect = socket.socket.connect
+
+    def patched_connect(self, address):
+        if address == SOCKET_PATH:
+            address = sock_path
+        return original_connect(self, address)
+
+    with patch.object(socket.socket, "connect", patched_connect):
+        return turn_credentials()
+
+
+def test_turn_credentials_timeout(turn_socket):
+    """Server accepts but never responds — must raise socket.timeout."""
+    sock_path, server = turn_socket
+
+    def accept_and_hang():
+        conn, _ = server.accept()
+        time.sleep(30)
+        conn.close()
+
+    t = threading.Thread(target=accept_and_hang, daemon=True)
+    t.start()
+
+    with pytest.raises(socket.timeout):
+        _call_turn_credentials(sock_path)
+
+
+def test_turn_credentials_connection_refused(tmp_path):
+    """Socket file doesn't exist — must raise ConnectionRefusedError or FileNotFoundError."""
+    missing = str(tmp_path / "nonexistent.socket")
+    with pytest.raises((ConnectionRefusedError, FileNotFoundError)):
+        _call_turn_credentials(missing)
+
+
+def test_turn_credentials_success(turn_socket):
+    """Server responds with credentials — must return stripped string."""
+    sock_path, server = turn_socket
+
+    def respond():
+        conn, _ = server.accept()
+        conn.sendall(b"testuser:testpass\n")
+        conn.close()
+
+    t = threading.Thread(target=respond, daemon=True)
+    t.start()
+
+    result = _call_turn_credentials(sock_path)
+    assert result == "testuser:testpass"
@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+import socket
+
+
+def turn_credentials(turn_socket_path) -> str:
+    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as client_socket:
+        client_socket.settimeout(5)
+        client_socket.connect(turn_socket_path)
+        with client_socket.makefile("rb") as file:
+            return file.readline().decode("utf-8").strip()
@@ -84,15 +84,6 @@ def run_cmd_options(parser):
    add_ssh_host_option(parser)


-def _warn_unused_settings(unused_keys, out):
-    if unused_keys:
-        names = ", ".join(unused_keys)
-        out.red(
-            f"WARNING: chatmail.ini contains settings that have no effect: {names}\n"
-            "Please remove them from chatmail.ini."
-        )
-
-
 def run_cmd(args, out):
    """Deploy chatmail services on the remote server."""

@@ -134,7 +125,6 @@ def run_cmd(args, out):
            out.green("Deploy completed.")
        else:
            out.green("Deploy completed, call `cmdeploy dns` next.")
-        _warn_unused_settings(args.config._unused_keys, out)
        return 0
    except subprocess.CalledProcessError:
        out.red("Deploy failed")
@@ -171,14 +171,16 @@ class UnboundDeployer(Deployer):
                "unbound-anchor -a /var/lib/unbound/root.key || true",
            ],
        )
-        self.ensure_directory(
-            path="/etc/unbound/unbound.conf.d",
-        )
-        self.put_template(
-            "unbound/unbound.conf.j2",
-            "/etc/unbound/unbound.conf.d/chatmail.conf",
-            disable_ipv6=self.config.disable_ipv6,
-        )
+        if self.config.disable_ipv6:
+            self.ensure_directory(
+                path="/etc/unbound/unbound.conf.d",
+            )
+            self.put_template(
+                "unbound/unbound.conf.j2",
+                "/etc/unbound/unbound.conf.d/chatmail.conf",
+            )
+        else:
+            self.remove_file("/etc/unbound/unbound.conf.d/chatmail.conf")

    def activate(self):
        server.shell(
@@ -389,12 +391,6 @@ class ChatmailDeployer(Deployer):
            src=BytesIO(b'APT::Install-Recommends "false";\n'),
            dest="/etc/apt/apt.conf.d/00InstallRecommends",
        )
-        # Pin dovecot-* to priority -1 before any apt operation, apt should
-        # never manage dovecot as our version might be lower than the distro's.
-        self.put_file(
-            src=StringIO("Package: dovecot-*\nPin: version *\nPin-Priority: -1\n"),
-            dest="/etc/apt/preferences.d/pin-dovecot",
-        )
        apt.update(name="apt update", cache_time=24 * 3600)
        apt.upgrade(name="upgrade apt packages", auto_remove=True)

@@ -518,8 +514,6 @@ def deploy_chatmail(config_path: Path, disable_mail: bool, website_only: bool) -
            (["master", "smtpd"], config.postfix_reinject_port_incoming),
            ("filtermail", config.filtermail_smtp_port),
            ("filtermail", config.filtermail_smtp_port_incoming),
-            ("filtermail", config.filtermail_http_port_incoming),
-            ("filtermail", config.filtermail_lmtp_port_transport),
        ]
        for service, port in port_services:
            print(f"Checking if port {port} is available for {service}...")
@@ -1,3 +1,4 @@
+import io
 import urllib.request

 from chatmaild.config import Config
@@ -18,18 +19,12 @@ DOVECOT_ARCHIVE_VERSION = "2.3.21+dfsg1-3"
 DOVECOT_PACKAGE_VERSION = f"1:{DOVECOT_ARCHIVE_VERSION}"

 DOVECOT_SHA256 = {
-    ("amd64", "bookworm", "core"): "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d",
-    ("arm64", "bookworm", "core"): "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9",
-    ("amd64", "bookworm", "imapd"): "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86",
-    ("arm64", "bookworm", "imapd"): "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f",
-    ("amd64", "bookworm", "lmtpd"): "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab",
-    ("arm64", "bookworm", "lmtpd"): "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f",
-    ("amd64", "trixie", "core"): "406d3781ed81e0913c472077dcf62cb1106e3855983efa6e44ddf43b4b0c9be1",
-    ("arm64", "trixie", "core"): "c75b0d9df11a77d07ebd8522920380c167fa47330ddefebe10575d99d0ecdf7f",
-    ("amd64", "trixie", "imapd"): "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86",
-    ("arm64", "trixie", "imapd"): "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f",
-    ("amd64", "trixie", "lmtpd"): "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab",
-    ("arm64", "trixie", "lmtpd"): "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f",
+    ("core", "amd64"): "dd060706f52a306fa863d874717210b9fe10536c824afe1790eec247ded5b27d",
+    ("core", "arm64"): "e7548e8a82929722e973629ecc40fcfa886894cef3db88f23535149e7f730dc9",
+    ("imapd", "amd64"): "8d8dc6fc00bbb6cdb25d345844f41ce2f1c53f764b79a838eb2a03103eebfa86",
+    ("imapd", "arm64"): "178fa877ddd5df9930e8308b518f4b07df10e759050725f8217a0c1fb3fd707f",
+    ("lmtpd", "amd64"): "2f69ba5e35363de50962d42cccbfe4ed8495265044e244007d7ccddad77513ab",
+    ("lmtpd", "arm64"): "89f52fb36524f5877a177dff4a713ba771fd3f91f22ed0af7238d495e143b38f",
 }


@@ -43,32 +38,34 @@ class DovecotDeployer(Deployer):

    def install(self):
        arch = host.get_fact(Arch)
-        codename = (host.get_fact(Command, "grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2") or "").strip()
-        if codename not in {key[1] for key in DOVECOT_SHA256}:
-            raise ValueError(f"Unsupported Debian codename: {codename!r}")
        with blocked_service_startup():
            debs = []
            for pkg in ("core", "imapd", "lmtpd"):
-                deb, changed = _download_dovecot_package(pkg, arch, codename)
+                deb, changed = _download_dovecot_package(pkg, arch)
                self.need_restart |= changed
                if deb:
                    debs.append(deb)
            if debs:
                deb_list = " ".join(debs)
-                # apt-get install with local .deb paths resolves depends
-                # against the configured repos (e.g. pulls libwrap0),
-                # The pin file written earlier by ChatmailDeployer prevents apt
-                # from installing a 'wrong' version
+                # First dpkg may fail on missing dependencies (stderr suppressed);
+                # apt-get --fix-broken pulls them in, then dpkg retries cleanly.
                server.shell(
                    name="Install dovecot packages",
                    commands=[
-                        "DEBIAN_FRONTEND=noninteractive apt-get install -y "
-                        '-o Dpkg::Options::="--force-confdef" '
-                        '-o Dpkg::Options::="--force-confold" '
-                        f"--allow-downgrades {deb_list}",
+                        f"dpkg --force-confdef --force-confold -i {deb_list} 2> /dev/null || true",
+                        "DEBIAN_FRONTEND=noninteractive apt-get -y --fix-broken install",
+                        f"dpkg --force-confdef --force-confold -i {deb_list}",
                    ],
                )
                self.need_restart = True
+        self.put_file(
+            src=io.StringIO(
+                "Package: dovecot-*\n"
+                "Pin: version *\n"
+                "Pin-Priority: -1\n"
+            ),
+            dest="/etc/apt/preferences.d/pin-dovecot",
+        )

    def configure(self):
        configure_remote_units(self, self.config.mail_domain_bare, self.units)
@@ -81,7 +78,7 @@ class DovecotDeployer(Deployer):
        if not self.disable_mail and not self.need_restart:
            stale = host.get_fact(
                Command,
-                "pid=$(systemctl show -p MainPID --value dovecot.service 2>/dev/null);"
+                'pid=$(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",
            )
@@ -105,13 +102,13 @@ def _pick_url(primary, fallback):
        return fallback


-def _download_dovecot_package(package: str, arch: str, codename: str) -> tuple[str | None, bool]:
+def _download_dovecot_package(package: str, arch: str) -> tuple[str | None, bool]:
    """Download a dovecot .deb if needed, return (path, changed)."""
    arch = "amd64" if arch == "x86_64" else arch
    arch = "arm64" if arch == "aarch64" else arch

    pkg_name = f"dovecot-{package}"
-    sha256 = DOVECOT_SHA256.get((arch, codename, package))
+    sha256 = DOVECOT_SHA256.get((package, arch))
    if sha256 is None:
        op = apt.packages(packages=[pkg_name])
        return None, bool(getattr(op, "changed", False))
@@ -122,10 +119,8 @@ def _download_dovecot_package(package: str, arch: str, codename: str) -> tuple[s

    url_version = DOVECOT_ARCHIVE_VERSION.replace("+", "%2B")
    deb_base = f"{pkg_name}_{url_version}_{arch}.deb"
-    primary_url = f"https://download.delta.chat/dovecot/{codename}/{url_version}/{deb_base}"
-    upstream_version = DOVECOT_ARCHIVE_VERSION.rsplit("-", 1)[0].replace("+", "%2B")
-    fallback_deb = f"{pkg_name}_{url_version}_{arch}_{codename}.deb"
-    fallback_url = f"https://github.com/chatmail/dovecot/releases/download/upstream%2F{upstream_version}/{fallback_deb}"
+    primary_url = f"https://download.delta.chat/dovecot/{deb_base}"
+    fallback_url = f"https://github.com/chatmail/dovecot/releases/download/upstream%2F{url_version}/{deb_base}"
    url = _pick_url(primary_url, fallback_url)
    deb_filename = f"/root/{deb_base}"

@@ -139,7 +134,6 @@ def _download_dovecot_package(package: str, arch: str, codename: str) -> tuple[s

    return deb_filename, True

-
 def _configure_dovecot(deployer, config: Config, debug: bool = False):
    """Configures Dovecot IMAP server."""
    deployer.put_template(
@@ -150,7 +144,9 @@ def _configure_dovecot(deployer, config: Config, debug: bool = False):
        disable_ipv6=config.disable_ipv6,
    )
    deployer.put_file("dovecot/auth.conf", "/etc/dovecot/auth.conf")
-    deployer.put_file("dovecot/push_notification.lua", "/etc/dovecot/push_notification.lua")
+    deployer.put_file(
+        "dovecot/push_notification.lua", "/etc/dovecot/push_notification.lua"
+    )

    # as per https://doc.dovecot.org/2.3/configuration_manual/os/
    # it is recommended to set the following inotify limits
@@ -20,10 +20,10 @@ class FiltermailDeployer(Deployer):
            return

        arch = host.get_fact(facts.server.Arch)
-        url = f"https://github.com/chatmail/filtermail/releases/download/v0.7.0/filtermail-{arch}"
+        url = f"https://github.com/chatmail/filtermail/releases/download/v0.6.6/filtermail-{arch}"
        sha256sum = {
-            "x86_64": "451f295a85b3b12dbb0f89e18ec319f742ee46dec218f20f7923bfb017a248bd",
-            "aarch64": "6833061b2a2028264fdeb32f0a6123e1ff73de57dace125364016300b748452e",
+            "x86_64": "05c7e7ac244606c2eeb275f2d282ffdbc2403e0169f1cdd3110ffcebdb994a92",
+            "aarch64": "8cf8bbda4d907beca547b365cc7e6753532a74b1712492d0d2f3d2d8a553fb3d",
        }[arch]
        self.download_executable(url, self.bin_path, sha256sum)

@@ -6,7 +6,6 @@ ExecStart={{ bin_path }} {{ config_path }} transport
 Restart=always
 RestartSec=30
 User=vmail
-LimitNOFILE=524288

 [Install]
 WantedBy=multi-user.target
@@ -53,8 +53,7 @@ smtpd_tls_exclude_ciphers = aNULL, RC4, MD5, DES
 # See <https://www.postfix.org/FORWARD_SECRECY_README.html#server_fs>.
 tls_preempt_cipherlist = yes

-# Reject by default, override per smtpd in master.cf
-smtpd_relay_restrictions = reject
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
 myhostname = {{ config.postfix_myhostname }}
 alias_maps = hash:/etc/aliases
 alias_database = hash:/etc/aliases
@@ -102,24 +101,9 @@ smtpd_peername_lookup = no
 # 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 }}
-
-# All deliveries over lmtp-filtermail are treated
-# as having the same destination [127.0.0.1],
-# so it is not possible to limit per-destination concurrency here,
-# it is a job for filtermail-transport.
-# Total number of parallel deliveries is limited
-# by "maxproc" column in /etc/postfix/master.cf for lmtp-filtermail.
-# Settings below are to prevent Postfix queue manager
-# from limiting the number of LMTP connections to filtermail-transport.
-# Read <https://www.postfix.org/TUNING_README.html#rope> and
-# <https://www.postfix.org/SCHEDULER_README.html> for the details
-# of the Postfix algorithm that we effectively disable here.
 lmtp-filtermail_initial_destination_concurrency=10000
 lmtp-filtermail_destination_concurrency_limit=10000

-# Do not try to deliver messages for more than 2 days.
-maximal_queue_lifetime = 2d
-
 {% if not config.ipv4_relay %}
 # DKIM-sign locally generated mail (bounces, DSNs).
 # These bypass smtpd, so they need explicit milter configuration.
@@ -17,7 +17,6 @@ smtp      inet  n       -       y       -       -       smtpd
  -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 }}
-  -o smtpd_relay_restrictions=reject_unauth_destination
 submission inet n       -       y       -       5000    smtpd
  -o syslog_name=postfix/submission
  -o smtpd_tls_security_level=encrypt
@@ -82,14 +81,12 @@ filter    unix -        n       n       -       -       lmtp
  -o syslog_name=postfix/reinject
  -o milter_macro_daemon_name=ORIGINATING
  -o cleanup_service_name=authclean
-  -o smtpd_relay_restrictions=permit_mynetworks,reject
 {% if not config.ipv4_relay %}  -o smtpd_milters=unix:opendkim/opendkim.sock
 {% endif %}

 # Local SMTP server for reinjecting incoming filtered mail 
 127.0.0.1:{{ config.postfix_reinject_port_incoming }} inet  n       -       n       -       100      smtpd
  -o syslog_name=postfix/reinject_incoming
-  -o smtpd_relay_restrictions=reject_unauth_destination

 # Cleanup `Received` headers for authenticated mail
 # to avoid leaking client IP.
@@ -105,15 +102,7 @@ filter    unix -        n       n       -       -       lmtp
 authclean unix  n       -       -       -       0       cleanup
  -o header_checks=regexp:/etc/postfix/submission_header_cleanup

-# Reducing `maxproc` here may result in a head of line blocking
-# when there are many messages sent to unreachable destinations
-# at the same time.
-# LMTP clients here talk to filtermail-transport.
-# LMTP has no pipelining,
-# so while filtermail-transport tries to deliver the message,
-# possibly waiting for a long connection timeout
-# or talking to a slow server, LMTP client cannot be reused.
-lmtp-filtermail unix  -       -       y       -       500       lmtp
+lmtp-filtermail unix  -       -       y       -       10000       lmtp
  -o syslog_name=postfix/lmtp-filtermail
  -o lmtp_header_checks=
  -o lmtp_tls_security_level=none
@@ -10,11 +10,13 @@ from pathlib import Path

 import pytest
 from chatmaild.config import is_valid_ipv4, read_config
+from domain_validator import DomainValidator


 def format_mail_domain(raw_domain: str) -> str:
    if is_valid_ipv4(raw_domain):
        return f"[{raw_domain}]"
+    DomainValidator().validate_domain_re(raw_domain)
    return raw_domain


@@ -347,9 +349,9 @@ class ChatmailACFactory:
                qr = (
                    f"dclogin:{addr}"
                    f"?p={password}&v=1"
-                    f"&ih={domain}&ip=993&is=ssl"
-                    f"&sh={domain}&sp=465&ss=ssl"
-                    f"&ic=3"
+                    f"&ih={domain}&ip=993"
+                    f"&sh={domain}&sp=465"
+                    f"&ic=3&ss=default"
                )
                future = account.add_transport_from_qr.future(qr)
            else:
@@ -360,7 +362,7 @@ class ChatmailACFactory:

            # ensure messages stay in INBOX so that they can be
            # concurrently fetched via extra IMAP connections during tests
-            account.set_config("bcc_self", "1")
+            account.set_config("delete_server_after", "10")
            accounts.append(account)

        for future in futures:
@@ -3,7 +3,6 @@ from types import SimpleNamespace

 import pytest
 from pyinfra.facts.deb import DebPackages
-from pyinfra.facts.server import Command

 from cmdeploy.dovecot import deployer as dovecot_deployer

@@ -20,7 +19,7 @@ def make_host(*fact_pairs):
    """
    facts = dict(fact_pairs)

-    def get_fact(cls, *args):
+    def get_fact(cls):
        if cls not in facts:
            registered = ", ".join(c.__name__ for c in facts)
            raise LookupError(
@@ -83,9 +82,7 @@ def test_download_dovecot_package_skips_epoch_matched_install(monkeypatch):
        lambda **kwargs: downloads.append(kwargs),
    )

-    deb, changed = dovecot_deployer._download_dovecot_package(
-        "core", "amd64", codename="bookworm"
-    )
+    deb, changed = dovecot_deployer._download_dovecot_package("core", "amd64")

    assert deb is None, f"expected no deb path when version matches, got {deb!r}"
    assert changed is False, "should not flag changed when version already installed"
@@ -112,9 +109,7 @@ def test_download_dovecot_package_uses_archive_version_for_url_and_filename(
        lambda **kwargs: downloads.append(kwargs),
    )

-    deb, changed = dovecot_deployer._download_dovecot_package(
-        "core", "amd64", codename="bookworm"
-    )
+    deb, changed = dovecot_deployer._download_dovecot_package("core", "amd64")

    archive_version = dovecot_deployer.DOVECOT_ARCHIVE_VERSION.replace("+", "%2B")
    expected_deb = f"/root/dovecot-core_{archive_version}_amd64.deb"
@@ -144,7 +139,6 @@ def test_install_skips_dpkg_path_when_epoch_matched_packages_present(
                },
            ),
            (dovecot_deployer.Arch, "x86_64"),
-            (Command, "bookworm"),
        ),
    )
    downloads = []
@@ -166,13 +160,11 @@ def test_install_skips_dpkg_path_when_epoch_matched_packages_present(
 def test_install_unsupported_arch_falls_back_to_apt(
    deployer, patch_blocked, mock_files_put, track_shell, monkeypatch
 ):
+    # For unsupported architectures, all fact lookups return the arch string.
    monkeypatch.setattr(
        dovecot_deployer,
        "host",
-        make_host(
-            (dovecot_deployer.Arch, "riscv64"),
-            (Command, "bookworm"),
-        ),
+        SimpleNamespace(get_fact=lambda cls: "riscv64"),
    )
    apt_calls = []

@@ -206,7 +198,6 @@ def test_install_runs_dpkg_when_packages_need_download(
        make_host(
            (dovecot_deployer.DebPackages, {}),
            (dovecot_deployer.Arch, "x86_64"),
-            (Command, "bookworm"),
        ),
    )
    monkeypatch.setattr(
@@ -226,12 +217,10 @@ def test_install_runs_dpkg_when_packages_need_download(
        f"expected one server.shell() call for dpkg install, got {len(track_shell)}"
    )
    cmds = track_shell[0]["commands"]
-    assert len(cmds) == 1, f"expected single apt-get install command, got: {cmds}"
-    assert "apt-get install -y" in cmds[0]
-    assert '-o Dpkg::Options::="--force-confdef"' in cmds[0]
-    assert '-o Dpkg::Options::="--force-confold"' in cmds[0]
-    assert "--allow-downgrades" in cmds[0]
-    assert ".deb" in cmds[0]
+    assert len(cmds) == 3, f"expected 3 dpkg/apt commands, got: {cmds}"
+    assert cmds[0].startswith("dpkg --force-confdef --force-confold -i ")
+    assert "apt-get -y --fix-broken install" in cmds[1]
+    assert cmds[2].startswith("dpkg --force-confdef --force-confold -i ")
    assert deployer.need_restart is True, (
        "need_restart should be True after dpkg install"
    )
@@ -246,19 +235,3 @@ def test_pick_url_falls_back_on_primary_error(monkeypatch):
    assert result == "http://fallback", (
        f"should fall back when primary fails, got {result!r}"
    )
-
-
-def test_install_fails_on_unsupported_debian_version(
-    deployer, patch_blocked, monkeypatch
-):
-    monkeypatch.setattr(
-        dovecot_deployer,
-        "host",
-        make_host(
-            (dovecot_deployer.Arch, "x86_64"),
-            (Command, "sid"),
-        ),
-    )
-
-    with pytest.raises(ValueError, match="Unsupported Debian codename"):
-        deployer.install()
@@ -1,7 +1,4 @@
-# Managed by cmdeploy
+# Managed by cmdeploy: disable IPv6 in unbound.
 server:
-{% if disable_ipv6 %}
  interface: 127.0.0.1
  do-ip6: no
-{% endif %}
-  cache-max-negative-ttl: 0
@@ -60,7 +60,6 @@ and run the following commands:
   ::

       git pull origin main --rebase --autostash
-       scripts/initenv.sh
       scripts/cmdeploy run

 If you don't want the latest development version,
@@ -156,7 +156,6 @@ Chatmail relay dependency diagram
        postfix --- |10083|filtermail-transport;
        filtermail-outgoing --- |10025 reinject|postfix;
        filtermail-incoming --- |10026 reinject|postfix;
-        postfix --- |milter opendkim.sock|OpenDKIM
        dovecot --- |doveauth.socket|doveauth;
        dovecot --- |message delivery|maildir["maildir
        /home/vmail/.../user"];
@@ -180,66 +179,26 @@ Chatmail relay dependency diagram
        style nginx-right fill:#f66;
        style postfix fill:#f66;
        style dovecot fill:#f66;
-        style OpenDKIM fill:#f66;
        style notification-proxy fill:#f66;

-Accepting and delivering mail
-----------------------------
+Message between users on the same relay
+---------------------------------------

 .. mermaid::
-    :caption: This diagram shows all the paths a message can take.
+    :caption: This diagram shows the path a non-federated message takes.

-    flowchart LR
-        subgraph chatmail relay
-            subgraph postfix
-                qmgr .-> lmtp-filtermail["lmtp/lmtp-filtermail (default_transport)"]
-                qmgr .-> lmtp["lmtp (local_transport)"]
-                lmtp --> cleanup["cleanup (lmtp_header_cleanup)"]
-                bounce
-                smtpd-submission["smtpd/submission"]
-                smtpd-smtps["smtpd/smtps"]
-                smtpd-reinject-outgoing["smtpd/reinject-outgoing"] --> authclean["cleanup/authclean (submission_header_cleanup)"]
-                authclean --> qmgr
-                smtpd-smtp["smtpd/smtp"]
-                smtpd-reinject-incoming["smtpd/reinject-incoming"] --> qmgr
-            end
-            lmtp-filtermail --LMTP inet:10083--> filtermail-transport
-            cleanup --LMTP unix:private/dovecot-lmtp --> dovecot
-            dovecot --> maildir
-            smtpd-submission --SMTP inet:10080--> filtermail-outgoing
-            smtpd-smtps --SMTP inet:10080--> filtermail-outgoing
-            filtermail-outgoing --SMTP inet:10025--> smtpd-reinject-outgoing
-            open-dkim["OpenDKIM (signing only)"] <--milter unix:opendkim/opendkim.sock--> smtpd-reinject-outgoing
-            bounce <--milter unix:opendkim/opendkim.sock--> open-dkim
-            bounce --> qmgr
-            nginx
-            smtpd-smtp -.SMTP inet:10081.-> filtermail-incoming
-            nginx -.HTTP inet:10082.-> filtermail-incoming
-            filtermail-incoming --SMTP inet:10026--> smtpd-reinject-incoming
-        end
-        filtermail-transport -.SMTP inet:25.-> mta1[Remote relay]
-        filtermail-transport -.HTTPS /mxdeliv.-> mta1
-        client[Client] -.SMTP inet:587.-> smtpd-submission
-        client -.SMTP inet:465.-> smtpd-smtps
-        client -.SMTP inet:443.-> nginx
-        nginx -.SMTP inet:465.-> smtpd-smtps
-        mta2[Remote relay] -.SMTP inet:25.-> smtpd-smtp
-        mta2 -.HTTPS /mxdeliv.-> nginx
-        style postfix fill:#363
-        style qmgr fill:#252
-        style authclean fill:#252
-        style cleanup fill:#252
-        style lmtp-filtermail fill:#252
-        style lmtp fill:#252
-        style bounce fill:#252
-        style smtpd-submission fill:#252
-        style smtpd-smtps fill:#252
-        style smtpd-reinject-outgoing fill:#252
-        style smtpd-reinject-incoming fill:#252
-        style smtpd-smtp fill:#252
-        style filtermail-outgoing fill:#225
-        style filtermail-incoming fill:#225
-        style filtermail-transport fill:#225
+    graph LR;
+        sender --> |465|smtps/smtpd;
+        sender --> |587|submission/smtpd;
+        smtps/smtpd --> |10080|filtermail;
+        submission/smtpd --> |10080|filtermail;
+        filtermail --> |10025|smtpd_reinject;
+        smtpd_reinject --> cleanup;
+        cleanup --> qmgr;
+        qmgr --> smtpd_accepts_message;
+        qmgr --> |lmtp|dovecot;
+        dovecot --> recipient;
+        dovecot --> sender's_other_devices;

 Operational details of a chatmail relay
 ----------------------------------------