Cleanup Received headers only on outgoing mail

chatmaild/pyproject.toml

@@ -8,9 +8,8 @@ version = "0.2"
 dependencies = [
   "aiosmtpd",
   "iniconfig",
-  "deltachat-rpc-server",
+  "deltachat-rpc-server==1.131.4",
   "deltachat-rpc-client",
-  "requests",
 ]
 
 [tool.setuptools]
@@ -21,7 +20,6 @@ where = ['src']
 
 [project.scripts]
 doveauth = "chatmaild.doveauth:main"
-chatmail-metadata = "chatmaild.metadata:main"
 filtermail = "chatmaild.filtermail:main"
 echobot = "chatmaild.echo:main"
 chatmail-metrics = "chatmaild.metrics:main"

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

@@ -1,10 +0,0 @@
-[Unit]
-Description=Chatmail dict proxy for IMAP METADATA
-
-[Service]
-ExecStart={execpath} /run/dovecot/metadata.socket vmail {config_path}
-Restart=always
-RestartSec=30
-
-[Install]
-WantedBy=multi-user.target

chatmaild/src/chatmaild/doveauth.py

@@ -58,18 +58,17 @@ def is_allowed_to_create(config: Config, user, cleartext_password) -> bool:
     return True
 
 
-def get_user_data(db, config: Config, user):
+def get_user_data(db, user):
     with db.read_connection() as conn:
         result = conn.get_user(user)
     if result:
-        result["home"] = f"/home/vmail/mail/{config.mail_domain}/{user}"
         result["uid"] = "vmail"
         result["gid"] = "vmail"
     return result
 
 
-def lookup_userdb(db, config: Config, user):
-    return get_user_data(db, config, user)
+def lookup_userdb(db, user):
+    return get_user_data(db, user)
 
 
 def lookup_passdb(db, config: Config, user, cleartext_password):
@@ -81,7 +80,6 @@ def lookup_passdb(db, config: Config, user, cleartext_password):
                 "UPDATE users SET last_login=? WHERE addr=?", (int(time.time()), user)
             )
 
-            userdata["home"] = f"/home/vmail/mail/{config.mail_domain}/{user}"
             userdata["uid"] = "vmail"
             userdata["gid"] = "vmail"
             return userdata
@@ -144,7 +142,7 @@ def handle_dovecot_request(msg, db, config: Config):
             if type == "userdb":
                 user = args[0]
                 if user.endswith(f"@{config.mail_domain}"):
-                    res = lookup_userdb(db, config, user)
+                    res = lookup_userdb(db, user)
                 if res:
                     reply_command = "O"
                 else:
@@ -162,19 +160,6 @@ def handle_dovecot_request(msg, db, config: Config):
     return None
 
 
-def handle_dovecot_protocol(rfile, wfile, db: Database, config: Config):
-    while True:
-        msg = rfile.readline().strip().decode()
-        if not msg:
-            break
-        res = handle_dovecot_request(msg, db, config)
-        if res:
-            wfile.write(res.encode("ascii"))
-            wfile.flush()
-        else:
-            logging.warning("request had no answer: %r", msg)
-
-
 class ThreadedUnixStreamServer(ThreadingMixIn, UnixStreamServer):
     request_queue_size = 100
 
@@ -188,7 +173,16 @@ def main():
     class Handler(StreamRequestHandler):
         def handle(self):
             try:
-                handle_dovecot_protocol(self.rfile, self.wfile, db, config)
+                while True:
+                    msg = self.rfile.readline().strip().decode()
+                    if not msg:
+                        break
+                    res = handle_dovecot_request(msg, db, config)
+                    if res:
+                        self.wfile.write(res.encode("ascii"))
+                        self.wfile.flush()
+                    else:
+                        logging.warn("request had no answer: %r", msg)
             except Exception:
                 logging.exception("Exception in the handler")
                 raise

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

@@ -33,7 +33,7 @@ password_min_length = 9
 passthrough_senders =
 
 # list of e-mail recipients for which to accept outbound un-encrypted mails
-passthrough_recipients = xstore@testrun.org groupsbot@hispanilandia.net
+passthrough_recipients =
 
 #
 # Deployment Details

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

@@ -1,7 +1,7 @@
 
 [privacy]
 
-passthrough_recipients = privacy@testrun.org xstore@testrun.org groupsbot@hispanilandia.net
+passthrough_recipients = privacy@testrun.org
 
 privacy_postal =
     Merlinux GmbH, Represented by the managing director H. Krekel,

chatmaild/src/chatmaild/metadata.py

@@ -1,154 +0,0 @@
-import pwd
-
-from queue import Queue
-from threading import Thread
-from socketserver import (
-    UnixStreamServer,
-    StreamRequestHandler,
-    ThreadingMixIn,
-)
-from .config import read_config
-import sys
-import logging
-import os
-import requests
-
-
-DICTPROXY_LOOKUP_CHAR = "L"
-DICTPROXY_ITERATE_CHAR = "I"
-DICTPROXY_SET_CHAR = "S"
-DICTPROXY_BEGIN_TRANSACTION_CHAR = "B"
-DICTPROXY_COMMIT_TRANSACTION_CHAR = "C"
-DICTPROXY_TRANSACTION_CHARS = "SBC"
-
-
-class Notifier:
-    def __init__(self):
-        self.guid2token = {}
-        self.to_notify_queue = Queue()
-
-    def set_token(self, guid, token):
-        self.guid2token[guid] = token
-
-    def new_message_for_guid(self, guid):
-        self.to_notify_queue.put(guid)
-
-    def thread_run_loop(self):
-        requests_session = requests.Session()
-        while 1:
-            self.thread_run_one(requests_session)
-
-    def thread_run_one(self, requests_session):
-        guid = self.to_notify_queue.get()
-        token = self.guid2token.get(guid)
-        if token:
-            response = requests_session.post(
-                "https://notifications.delta.chat/notify",
-                data=token,
-                timeout=60,
-            )
-            if response.status_code == 410:
-                # 410 Gone status code
-                # means the token is no longer valid.
-                del self.guid2token[guid]
-
-
-def handle_dovecot_protocol(rfile, wfile, notifier):
-    # HELLO message, ignored.
-    msg = rfile.readline().strip().decode()
-
-    transactions = {}
-    while True:
-        msg = rfile.readline().strip().decode()
-        if not msg:
-            break
-
-        res = handle_dovecot_request(msg, transactions, notifier)
-        if res:
-            wfile.write(res.encode("ascii"))
-            wfile.flush()
-
-
-def handle_dovecot_request(msg, transactions, notifier):
-    # see https://doc.dovecot.org/3.0/developer_manual/design/dict_protocol/
-    short_command = msg[0]
-    parts = msg[1:].split("\t")
-    if short_command == DICTPROXY_LOOKUP_CHAR:
-        return "N\n"
-    elif short_command == DICTPROXY_ITERATE_CHAR:
-        # Empty line means ITER_FINISHED.
-        # If we don't return empty line Dovecot will timeout.
-        return "\n"
-
-    if short_command not in (DICTPROXY_TRANSACTION_CHARS):
-        return
-
-    transaction_id = parts[0]
-
-    if short_command == DICTPROXY_BEGIN_TRANSACTION_CHAR:
-        transactions[transaction_id] = "O\n"
-    elif short_command == DICTPROXY_COMMIT_TRANSACTION_CHAR:
-        # returns whether it failed or succeeded.
-        return transactions.pop(transaction_id, "N\n")
-    elif short_command == DICTPROXY_SET_CHAR:
-        # See header of
-        # <https://github.com/dovecot/core/blob/5e7965632395793d9355eb906b173bf28d2a10ca/src/lib-storage/mailbox-attribute.h>
-        # for the documentation on the structure of the key.
-
-        # Request GETMETADATA "INBOX" /private/chatmail
-        # results in a query for
-        # priv/dd72550f05eadc65542a1200cac67ad7/chatmail
-        #
-        # Request GETMETADATA "" /private/chatmail
-        # results in
-        # priv/dd72550f05eadc65542a1200cac67ad7/vendor/vendor.dovecot/pvt/server/chatmail
-
-        keyname = parts[1].split("/")
-        value = parts[2] if len(parts) > 2 else ""
-        if keyname[0] == "priv" and keyname[2] == "devicetoken":
-            notifier.set_token(keyname[1], value)
-        elif keyname[0] == "priv" and keyname[2] == "messagenew":
-            notifier.new_message_for_guid(keyname[1])
-        else:
-            # Transaction failed.
-            transactions[transaction_id] = "F\n"
-
-
-class ThreadedUnixStreamServer(ThreadingMixIn, UnixStreamServer):
-    request_queue_size = 100
-
-
-def main():
-    socket, username, config = sys.argv[1:]
-    passwd_entry = pwd.getpwnam(username)
-
-    # XXX config is not currently used
-    config = read_config(config)
-    notifier = Notifier()
-
-    class Handler(StreamRequestHandler):
-        def handle(self):
-            try:
-                handle_dovecot_protocol(self.rfile, self.wfile, notifier)
-            except Exception:
-                logging.exception("Exception in the handler")
-                raise
-
-    try:
-        os.unlink(socket)
-    except FileNotFoundError:
-        pass
-
-    # start notifier thread for signalling new messages to
-    # Delta Chat notification server
-
-    t = Thread(target=notifier.thread_run_loop)
-    t.setDaemon(True)
-    t.start()
-
-    with ThreadedUnixStreamServer(socket, Handler) as server:
-        os.chown(socket, uid=passwd_entry.pw_uid, gid=passwd_entry.pw_gid)
-        try:
-            server.serve_forever()
-        except KeyboardInterrupt:
-            pass

chatmaild/src/chatmaild/tests/plugin.py

@@ -1,6 +1,4 @@
 import random
-from pathlib import Path
-import os
 import importlib.resources
 import itertools
 from email.parser import BytesParser
@@ -59,12 +57,7 @@ def db(tmpdir):
 
 @pytest.fixture
 def maildata(request):
-    try:
-        datadir = importlib.resources.files(__package__).joinpath("mail-data")
-    except TypeError:
-        # in python3.9 or lower, the above doesn't work, so we get datadir this way:
-        datadir = Path(os.getcwd()).joinpath("chatmaild/src/chatmaild/tests/mail-data")
-
+    datadir = importlib.resources.files(__package__).joinpath("mail-data")
     assert datadir.exists(), datadir
 
     def maildata(name, from_addr, to_addr):

chatmaild/src/chatmaild/tests/test_config.py

@@ -28,5 +28,5 @@ def test_read_config_testrun(make_config):
     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_recipients == ["privacy@testrun.org"]
     assert config.passthrough_senders == []

chatmaild/src/chatmaild/tests/test_doveauth.py

@@ -1,23 +1,17 @@
-import io
 import json
 import pytest
-import queue
 import threading
+import queue
 import traceback
 
 import chatmaild.doveauth
-from chatmaild.doveauth import (
-    get_user_data,
-    lookup_passdb,
-    handle_dovecot_request,
-    handle_dovecot_protocol,
-)
+from chatmaild.doveauth import get_user_data, lookup_passdb, handle_dovecot_request
 from chatmaild.database import DBError
 
 
 def test_basic(db, example_config):
     lookup_passdb(db, example_config, "asdf12345@chat.example.org", "q9mr3faue")
-    data = get_user_data(db, example_config, "asdf12345@chat.example.org")
+    data = get_user_data(db, "asdf12345@chat.example.org")
     assert data
     data2 = lookup_passdb(
         db, example_config, "asdf12345@chat.example.org", "q9mr3jewvadsfaue"
@@ -43,7 +37,7 @@ def test_nocreate_file(db, monkeypatch, tmpdir, example_config):
     lookup_passdb(
         db, example_config, "newuser12@chat.example.org", "zequ0Aimuchoodaechik"
     )
-    assert not get_user_data(db, example_config, "newuser12@chat.example.org")
+    assert not get_user_data(db, "newuser12@chat.example.org")
 
 
 def test_db_version(db):
@@ -75,15 +69,6 @@ def test_handle_dovecot_request(db, example_config):
     assert userdata["password"].startswith("{SHA512-CRYPT}")
 
 
-def test_handle_dovecot_protocol(db, example_config):
-    rfile = io.BytesIO(
-        b"H3\t2\t0\t\tauth\nLshared/userdb/foobar@chat.example.org\tfoobar@chat.example.org\n"
-    )
-    wfile = io.BytesIO()
-    handle_dovecot_protocol(rfile, wfile, db, example_config)
-    assert wfile.getvalue() == b"N\n"
-
-
 def test_50_concurrent_lookups_different_accounts(db, gencreds, example_config):
     num_threads = 50
     req_per_thread = 5

chatmaild/src/chatmaild/tests/test_metadata.py

@@ -1,147 +0,0 @@
-import io
-
-from chatmaild.metadata import (
-    handle_dovecot_request,
-    handle_dovecot_protocol,
-    Notifier,
-)
-
-
-def test_handle_dovecot_request_lookup_fails():
-    notifier = Notifier()
-    res = handle_dovecot_request("Lpriv/123/chatmail", {}, notifier)
-    assert res == "N\n"
-
-
-def test_handle_dovecot_request_happy_path():
-    notifier = Notifier()
-    transactions = {}
-
-    # lookups return the same NOTFOUND result
-    res = handle_dovecot_request("Lpriv/123/chatmail", transactions, notifier)
-    assert res == "N\n"
-    assert not notifier.guid2token and not transactions
-
-    # set device token in a transaction
-    tx = "1111"
-    msg = f"B{tx}\tuser"
-    res = handle_dovecot_request(msg, transactions, notifier)
-    assert not res and not notifier.guid2token
-    assert transactions == {tx: "O\n"}
-
-    msg = f"S{tx}\tpriv/guid00/devicetoken\t01234"
-    res = handle_dovecot_request(msg, transactions, notifier)
-    assert not res
-    assert len(transactions) == 1
-    assert len(notifier.guid2token) == 1
-    assert notifier.guid2token["guid00"] == "01234"
-
-    msg = f"C{tx}"
-    res = handle_dovecot_request(msg, transactions, notifier)
-    assert res == "O\n"
-    assert len(transactions) == 0
-    assert notifier.guid2token["guid00"] == "01234"
-
-    # trigger notification for incoming message
-    assert handle_dovecot_request(f"B{tx}\tuser", transactions, notifier) is None
-    msg = f"S{tx}\tpriv/guid00/messagenew"
-    assert handle_dovecot_request(msg, transactions, notifier) is None
-    assert notifier.to_notify_queue.get() == "guid00"
-    assert notifier.to_notify_queue.qsize() == 0
-    assert handle_dovecot_request(f"C{tx}\tuser", transactions, notifier) == "O\n"
-    assert not transactions
-
-
-def test_handle_dovecot_protocol_set_devicetoken():
-    rfile = io.BytesIO(
-        b"\n".join(
-            [
-                b"HELLO",
-                b"Btx00\tuser",
-                b"Stx00\tpriv/guid00/devicetoken\t01234",
-                b"Ctx00",
-            ]
-        )
-    )
-    wfile = io.BytesIO()
-    notifier = Notifier()
-    handle_dovecot_protocol(rfile, wfile, notifier)
-    assert notifier.guid2token["guid00"] == "01234"
-    assert wfile.getvalue() == b"O\n"
-
-
-def test_handle_dovecot_protocol_iterate():
-    rfile = io.BytesIO(
-        b"\n".join(
-            [
-                b"H",
-                b"I9\t0\tpriv/5cbe730f146fea6535be0d003dd4fc98/\tci-2dzsrs@nine.testrun.org",
-            ]
-        )
-    )
-    wfile = io.BytesIO()
-    notifier = Notifier()
-    handle_dovecot_protocol(rfile, wfile, notifier)
-    assert wfile.getvalue() == b"\n"
-
-
-def test_handle_dovecot_protocol_messagenew():
-    rfile = io.BytesIO(
-        b"\n".join(
-            [
-                b"HELLO",
-                b"Btx01\tuser",
-                b"Stx01\tpriv/guid00/messagenew",
-                b"Ctx01",
-            ]
-        )
-    )
-    wfile = io.BytesIO()
-    notifier = Notifier()
-    handle_dovecot_protocol(rfile, wfile, notifier)
-    assert wfile.getvalue() == b"O\n"
-    assert notifier.to_notify_queue.get() == "guid00"
-    assert notifier.to_notify_queue.qsize() == 0
-
-
-def test_notifier_thread_run():
-    requests = []
-
-    class ReqMock:
-        def post(self, url, data, timeout):
-            requests.append((url, data, timeout))
-
-            class Result:
-                status_code = 200
-
-            return Result()
-
-    notifier = Notifier()
-    notifier.set_token("guid00", "01234")
-    notifier.new_message_for_guid("guid00")
-    notifier.thread_run_one(ReqMock())
-    url, data, timeout = requests[0]
-    assert data == "01234"
-    assert len(notifier.guid2token) == 1
-
-
-def test_notifier_thread_run_gone_removes_token():
-    requests = []
-
-    class ReqMock:
-        def post(self, url, data, timeout):
-            requests.append((url, data, timeout))
-
-            class Result:
-                status_code = 410
-
-            return Result()
-
-    notifier = Notifier()
-    notifier.set_token("guid00", "01234")
-    notifier.new_message_for_guid("guid00")
-    assert notifier.guid2token["guid00"] == "01234"
-    notifier.thread_run_one(ReqMock())
-    url, data, timeout = requests[0]
-    assert data == "01234"
-    assert len(notifier.guid2token) == 0

cmdeploy/src/cmdeploy/__init__.py

@@ -1,7 +1,6 @@
 """
 Chat Mail pyinfra deploy.
 """
-
 import sys
 import importlib.resources
 import subprocess
@@ -102,7 +101,6 @@ def _install_remote_venv_with_chatmaild(config) -> None:
         "doveauth",
         "filtermail",
         "echobot",
-        "chatmail-metadata",
     ):
         params = dict(
             execpath=f"{remote_venv_dir}/bin/{fn}",
@@ -128,107 +126,6 @@ def _install_remote_venv_with_chatmaild(config) -> None:
         )
 
 
-def _configure_opendkim(domain: str, dkim_selector: str = "dkim") -> bool:
-    """Configures OpenDKIM"""
-    need_restart = False
-
-    server.group(name="Create opendkim group", group="opendkim", system=True)
-    server.user(
-        name="Create opendkim user",
-        user="opendkim",
-        groups=["opendkim"],
-        system=True,
-    )
-    server.user(
-        name="Add postfix user to opendkim group for socket access",
-        user="postfix",
-        groups=["opendkim"],
-        system=True,
-    )
-
-    main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/opendkim.conf"),
-        dest="/etc/opendkim.conf",
-        user="root",
-        group="root",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= main_config.changed
-
-    screen_script = files.put(
-        src=importlib.resources.files(__package__).joinpath("opendkim/screen.lua"),
-        dest="/etc/opendkim/screen.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= screen_script.changed
-
-    final_script = files.put(
-        src=importlib.resources.files(__package__).joinpath("opendkim/final.lua"),
-        dest="/etc/opendkim/final.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= final_script.changed
-
-    files.directory(
-        name="Add opendkim directory to /etc",
-        path="/etc/opendkim",
-        user="opendkim",
-        group="opendkim",
-        mode="750",
-        present=True,
-    )
-
-    keytable = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/KeyTable"),
-        dest="/etc/dkimkeys/KeyTable",
-        user="opendkim",
-        group="opendkim",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= keytable.changed
-
-    signing_table = files.template(
-        src=importlib.resources.files(__package__).joinpath("opendkim/SigningTable"),
-        dest="/etc/dkimkeys/SigningTable",
-        user="opendkim",
-        group="opendkim",
-        mode="644",
-        config={"domain_name": domain, "opendkim_selector": dkim_selector},
-    )
-    need_restart |= signing_table.changed
-    files.directory(
-        name="Add opendkim socket directory to /var/spool/postfix",
-        path="/var/spool/postfix/opendkim",
-        user="opendkim",
-        group="opendkim",
-        mode="750",
-        present=True,
-    )
-
-    apt.packages(
-        name="apt install opendkim opendkim-tools",
-        packages=["opendkim", "opendkim-tools"],
-    )
-
-    if not host.get_fact(File, f"/etc/dkimkeys/{dkim_selector}.private"):
-        server.shell(
-            name="Generate OpenDKIM domain keys",
-            commands=[
-                f"opendkim-genkey -D /etc/dkimkeys -d {domain} -s {dkim_selector}"
-            ],
-            _sudo=True,
-            _sudo_user="opendkim",
-        )
-
-    return need_restart
-
-
 def _install_mta_sts_daemon() -> bool:
     need_restart = False
 
@@ -303,16 +200,6 @@ def _configure_postfix(config: Config, debug: bool = False) -> bool:
     )
     need_restart |= header_cleanup.changed
 
-    # Login map that 1:1 maps email address to login.
-    login_map = files.put(
-        src=importlib.resources.files(__package__).joinpath("postfix/login_map"),
-        dest="/etc/postfix/login_map",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= login_map.changed
-
     return need_restart
 
 
@@ -338,27 +225,6 @@ def _configure_dovecot(config: Config, debug: bool = False) -> bool:
         mode="644",
     )
     need_restart |= auth_config.changed
-    lua_push_notification_script = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "dovecot/push_notification.lua"
-        ),
-        dest="/etc/dovecot/push_notification.lua",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= lua_push_notification_script.changed
-
-    sieve_script = files.put(
-        src=importlib.resources.files(__package__).joinpath(
-            "dovecot/default.sieve"
-        ),
-        dest="/etc/dovecot/default.sieve",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    need_restart |= sieve_script.changed
 
     files.template(
         src=importlib.resources.files(__package__).joinpath("dovecot/expunge.cron.j2"),
@@ -439,18 +305,113 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
     return need_restart
 
 
-def _remove_rspamd() -> None:
-    """Remove rspamd"""
-    apt.packages(name="Remove rspamd", packages="rspamd", present=False)
+def remove_opendkim() -> None:
+    """Remove OpenDKIM, deprecated"""
+    files.file(
+        name="Remove legacy opendkim.conf",
+        path="/etc/opendkim.conf",
+        present=False,
+    )
+
+    files.directory(
+        name="Remove legacy opendkim socket directory from /var/spool/postfix",
+        path="/var/spool/postfix/opendkim",
+        present=False,
+    )
+
+    apt.packages(name="Remove openDKIM", packages="opendkim", present=False)
+
+
+def _configure_rspamd(dkim_selector: str, mail_domain: str) -> bool:
+    """Configures rspamd for Rate Limiting."""
+    need_restart = False
+
+    apt.packages(
+        name="apt install rspamd",
+        packages="rspamd",
+    )
+
+    for module in ["phishing", "rbl", "hfilter", "ratelimit"]:
+        disabled_module_conf = files.put(
+            name=f"disable {module} rspamd plugin",
+            src=importlib.resources.files(__package__).joinpath("rspamd/disabled.conf"),
+            dest=f"/etc/rspamd/local.d/{module}.conf",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        need_restart |= disabled_module_conf.changed
+
+    options_inc = files.put(
+        name="disable fuzzy checks",
+        src=importlib.resources.files(__package__).joinpath("rspamd/options.inc"),
+        dest="/etc/rspamd/local.d/options.inc",
+        user="root",
+        group="root",
+        mode="644",
+    )
+    need_restart |= options_inc.changed
+
+    # https://rspamd.com/doc/modules/force_actions.html
+    force_actions_conf = files.put(
+        name="Set up rules to reject on DKIM, SPF and DMARC fails",
+        src=importlib.resources.files(__package__).joinpath(
+            "rspamd/force_actions.conf"
+        ),
+        dest="/etc/rspamd/local.d/force_actions.conf",
+        user="root",
+        group="root",
+        mode="644",
+    )
+    need_restart |= force_actions_conf.changed
+
+    dkim_directory = "/var/lib/rspamd/dkim/"
+    dkim_key_path = f"{dkim_directory}{mail_domain}.{dkim_selector}.key"
+    dkim_dns_file = f"{dkim_directory}{mail_domain}.{dkim_selector}.zone"
+
+    dkim_config = files.template(
+        src=importlib.resources.files(__package__).joinpath(
+            "rspamd/dkim_signing.conf.j2"
+        ),
+        dest="/etc/rspamd/local.d/dkim_signing.conf",
+        user="root",
+        group="root",
+        mode="644",
+        config={
+            "dkim_selector": str(dkim_selector),
+            "mail_domain": mail_domain,
+            "dkim_key_path": dkim_key_path,
+        },
+    )
+    need_restart |= dkim_config.changed
+
+    files.directory(
+        name="ensure DKIM key directory exists",
+        path=dkim_directory,
+        present=True,
+        user="_rspamd",
+        group="_rspamd",
+    )
+
+    if not host.get_fact(File, dkim_key_path):
+        server.shell(
+            name="Generate DKIM domain keys with rspamd",
+            commands=[
+                f"rspamadm dkim_keygen -b 2048 -s {dkim_selector} -d {mail_domain} -k {dkim_key_path} > {dkim_dns_file}"
+            ],
+            _sudo=True,
+            _sudo_user="_rspamd",
+        )
+
+    return need_restart
 
 
 def check_config(config):
     mail_domain = config.mail_domain
     if mail_domain != "testrun.org" and not mail_domain.endswith(".testrun.org"):
         blocked_words = "merlinux schmieder testrun.org".split()
-        for key in config.__dict__:
-            value = config.__dict__[key]
-            if key.startswith("privacy") and any(x in str(value) for x in blocked_words):
+        for value in config.__dict__.values():
+            if any(x in str(value) for x in blocked_words):
                 raise ValueError(
                     f"please set your own privacy contacts/addresses in {config._inipath}"
                 )
@@ -471,10 +432,6 @@ def deploy_chatmail(config_path: Path) -> None:
     apt.update(name="apt update", cache_time=24 * 3600)
     server.group(name="Create vmail group", group="vmail", system=True)
     server.user(name="Create vmail user", user="vmail", group="vmail", system=True)
-    apt.packages(
-        name="Install rsync",
-        packages=["rsync"],
-    )
 
     # Run local DNS resolver `unbound`.
     # `resolvconf` takes care of setting up /etc/resolv.conf
@@ -510,7 +467,7 @@ def deploy_chatmail(config_path: Path) -> None:
 
     apt.packages(
         name="Install Dovecot",
-        packages=["dovecot-imapd", "dovecot-lmtpd", "dovecot-sieve"],
+        packages=["dovecot-imapd", "dovecot-lmtpd"],
     )
 
     apt.packages(
@@ -537,15 +494,15 @@ def deploy_chatmail(config_path: Path) -> None:
     mta_sts_need_restart = _install_mta_sts_daemon()
     nginx_need_restart = _configure_nginx(mail_domain)
 
-    _remove_rspamd()
-    opendkim_need_restart = _configure_opendkim(mail_domain, "opendkim")
+    remove_opendkim()
+    rspamd_need_restart = _configure_rspamd("dkim", mail_domain)
 
     systemd.service(
-        name="Start and enable OpenDKIM",
-        service="opendkim.service",
+        name="Start and enable rspamd",
+        service="rspamd.service",
         running=True,
         enabled=True,
-        restarted=opendkim_need_restart,
+        restarted=rspamd_need_restart,
     )
 
     systemd.service(

cmdeploy/src/cmdeploy/chatmail.zone.f

@@ -6,10 +6,10 @@ _submissions._tcp.{chatmail_domain}. SRV 0 1 465 {chatmail_domain}.
 _imap._tcp.{chatmail_domain}.        SRV 0 1 143 {chatmail_domain}.
 _imaps._tcp.{chatmail_domain}.       SRV 0 1 993 {chatmail_domain}.
 {chatmail_domain}.                   CAA 128 issue "letsencrypt.org;accounturi={acme_account_url}"
-{chatmail_domain}.                   TXT "v=spf1 a:{chatmail_domain} ~all"
+{chatmail_domain}.                   TXT "v=spf1 a:{chatmail_domain} -all"
 _dmarc.{chatmail_domain}.            TXT "v=DMARC1;p=reject;adkim=s;aspf=s"
 _mta-sts.{chatmail_domain}.          TXT "v=STSv1; id={sts_id}"
 mta-sts.{chatmail_domain}.           CNAME {chatmail_domain}.
 www.{chatmail_domain}.               CNAME {chatmail_domain}.
+_smtp._tls.{chatmail_domain}.        TXT "v=TLSRPTv1;rua=mailto:{email}"
 {dkim_entry}
-_adsp._domainkey.{chatmail_domain}.  TXT "dkim=discardable"

cmdeploy/src/cmdeploy/cmdeploy.py

@@ -2,7 +2,6 @@
 Provides the `cmdeploy` entry point function,
 along with command line option and subcommand parsing.
 """
-
 import argparse
 import shutil
 import subprocess

cmdeploy/src/cmdeploy/dns.py

@@ -5,8 +5,6 @@ import importlib
 import subprocess
 import datetime
 
-from typing import Optional
-
 
 class DNS:
     def __init__(self, out, mail_domain):
@@ -36,11 +34,12 @@ class DNS:
         cmd = "ip a | grep inet6 | grep 'scope global' | sed -e 's#/64 scope global##' | sed -e 's#inet6##'"
         return self.shell(cmd).strip()
 
-    def get(self, typ: str, domain: str) -> str:
-        """Get a DNS entry or empty string if there is none."""
+    def get(self, typ: str, domain: str) -> str | None:
+        """Get a DNS entry"""
         dig_result = self.shell(f"dig -r -q {domain} -t {typ} +short")
         line = dig_result.partition("\n")[0]
-        return line
+        if line:
+            return line
 
     def check_ptr_record(self, ip: str, mail_domain) -> bool:
         """Check the PTR record for an IPv4 or IPv6 address."""
@@ -55,25 +54,27 @@ def show_dns(args, out) -> int:
     ssh = f"ssh root@{mail_domain}"
     dns = DNS(out, mail_domain)
 
+    def read_dkim_entries(entry):
+        lines = []
+        for line in entry.split("\n"):
+            if line.startswith(";") or not line.strip():
+                continue
+            line = line.replace("\t", " ")
+            lines.append(line)
+        lines[0] = f"dkim._domainkey.{mail_domain}. IN TXT " + lines[0].strip(
+            "dkim._domainkey IN TXT "
+        )
+        return "\n".join(lines)
+
     print("Checking your DKIM keys and DNS entries...")
     try:
         acme_account_url = out.shell_output(f"{ssh} -- acmetool account-url")
     except subprocess.CalledProcessError:
         print("Please run `cmdeploy run` first.")
         return 1
-
-    dkim_selector = "opendkim"
-    dkim_pubkey = out.shell_output(
-        ssh + f" -- openssl rsa -in /etc/dkimkeys/{dkim_selector}.private"
-        " -pubout 2>/dev/null | awk '/-/{next}{printf(\"%s\",$0)}'"
+    dkim_entry = read_dkim_entries(
+        out.shell_output(f"{ssh} -- cat /var/lib/rspamd/dkim/{mail_domain}.dkim.zone")
     )
-    dkim_entry_value = f"v=DKIM1;k=rsa;p={dkim_pubkey};s=email;t=s"
-    dkim_entry_str = ""
-    while len(dkim_entry_value) >= 255:
-        dkim_entry_str += '"' + dkim_entry_value[:255] + '" '
-        dkim_entry_value = dkim_entry_value[255:]
-    dkim_entry_str += '"' + dkim_entry_value + '"'
-    dkim_entry = f"{dkim_selector}._domainkey.{mail_domain}. TXT {dkim_entry_str}"
 
     ipv6 = dns.get_ipv6()
     reverse_ipv6 = dns.check_ptr_record(ipv6, mail_domain)
@@ -86,6 +87,7 @@ def show_dns(args, out) -> int:
             f.read()
             .format(
                 acme_account_url=acme_account_url,
+                email=f"root@{args.config.mail_domain}",
                 sts_id=datetime.datetime.now().strftime("%Y%m%d%H%M"),
                 chatmail_domain=args.config.mail_domain,
                 dkim_entry=dkim_entry,
@@ -101,9 +103,11 @@ def show_dns(args, out) -> int:
             return 0
         except TypeError:
             pass
+        started_dkim_parsing = False
         for line in zonefile.splitlines():
             line = line.format(
                 acme_account_url=acme_account_url,
+                email=f"root@{args.config.mail_domain}",
                 sts_id=datetime.datetime.now().strftime("%Y%m%d%H%M"),
                 chatmail_domain=args.config.mail_domain,
                 dkim_entry=dkim_entry,
@@ -127,23 +131,28 @@ def show_dns(args, out) -> int:
                 current = dns.get("SRV", domain[:-1])
                 if current != f"{prio} {weight} {port} {value}":
                     to_print.append(line)
-            if " TXT " in line:
+            if "  TXT " in line:
                 domain, value = line.split(" TXT ")
                 current = dns.get("TXT", domain.strip()[:-1])
                 if domain.startswith("_mta-sts."):
                     if current:
                         if current.split("id=")[0] == value.split("id=")[0]:
                             continue
-
-                # TXT records longer than 255 bytes
-                # are split into multiple <character-string>s.
-                # This typically happens with DKIM record
-                # which contains long RSA key.
-                #
-                # Removing `" "` before comparison
-                # to get back a single string.
-                if current.replace('" "', "") != value.replace('" "', ""):
+                if current != value:
                     to_print.append(line)
+            if " IN TXT ( " in line:
+                started_dkim_parsing = True
+                dkim_lines = [line]
+            if started_dkim_parsing and line.startswith('"'):
+                dkim_lines.append(" " + line)
+        domain, data = "\n".join(dkim_lines).split(" IN TXT ")
+        current = dns.get("TXT", domain.strip()[:-1])
+        if current:
+            current = "( %s" % (current.replace('" "', '"\n "'))
+            if current != data:
+                to_print.append(dkim_entry)
+        else:
+            to_print.append(dkim_entry)
 
     exit_code = 0
     if to_print:

cmdeploy/src/cmdeploy/dovecot/default.sieve

@@ -1,5 +0,0 @@
-require ["imap4flags"];
-
-if header :is ["Auto-Submitted"] ["auto-replied", "auto-generated"] {
-	addflag "$Auto";
-}

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

@@ -13,21 +13,13 @@ auth_cache_size = 100M
 mail_debug = yes
 {% endif %}
 
-# Prevent warnings similar to:
-#   config: Warning: service auth { client_limit=1000 } is lower than required under max. load (10200). Counted for protocol services with service_count != 1: service lmtp { process_limit=100 } + service imap-urlauth-login { process_limit=100 } + service imap-login { process_limit=10000 }
-#   config: Warning: service anvil { client_limit=1000 } is lower than required under max. load (10103). Counted with: service imap-urlauth-login { process_limit=100 } + service imap-login { process_limit=10000 } + service auth { process_limit=1 }
-#   master: Warning: service(stats): client_limit (1000) reached, client connections are being dropped
-default_client_limit = 20000
-
-mail_server_admin = mailto:root@{{ config.mail_domain }}
-mail_server_comment = Chatmail server
 
 mail_plugins = quota
 
 # these are the capabilities Delta Chat cares about actually 
 # so let's keep the network overhead per login small
 # https://github.com/deltachat/deltachat-core-rust/blob/master/src/imap/capabilities.rs
-imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE NOTIFY METADATA XDELTAPUSH
+imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE NOTIFY
 
 
 # Authentication for system users.
@@ -77,32 +69,14 @@ mail_privileged_group = vmail
 ## Mail processes
 ##
 
-# Pass all IMAP METADATA requests to the server implementing Dovecot's dict protocol.
-mail_attribute_dict = proxy:/run/dovecot/metadata.socket:metadata
-
 # Enable IMAP COMPRESS (RFC 4978).
 # <https://datatracker.ietf.org/doc/html/rfc4978.html>
 protocol imap {
   mail_plugins = $mail_plugins imap_zlib imap_quota
-  imap_metadata = yes
 }
 
 protocol lmtp {
-  # quota plugin documentation:
-  # <https://doc.dovecot.org/configuration_manual/quota_plugin/>
-  #
-  # notify plugin is a dependency of push_notification plugin:
-  # <https://doc.dovecot.org/settings/plugin/notify-plugin/>
-  #
-  # push_notification plugin documentation:
-  # <https://doc.dovecot.org/configuration_manual/push_notification/>
-  #
-  # mail_lua and push_notification_lua are needed for Lua push notification handler.
-  # <https://doc.dovecot.org/configuration_manual/push_notification/#configuration>
-  #
-  # Sieve to mark messages that should not be notified as \Seen
-  # <https://doc.dovecot.org/configuration_manual/sieve/configuration/>
-  mail_plugins = $mail_plugins quota mail_lua notify push_notification push_notification_lua sieve
+  mail_plugins = $mail_plugins quota
 }
 
 plugin {
@@ -118,15 +92,7 @@ plugin {
   # quota_over_flag_value = TRUE
 }
 
-# push_notification configuration
-plugin {
-  # <https://doc.dovecot.org/configuration_manual/push_notification/#lua-lua>
-  push_notification_driver = lua:file=/etc/dovecot/push_notification.lua
-}
 
-plugin {
-  sieve_default = file:/etc/dovecot/default.sieve
-}
 
 service lmtp {
   user=vmail

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

@@ -1,11 +1,10 @@
 # delete all mails after {{ config.delete_mails_after }} days, in the Inbox
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/cur/*' -mtime +{{ config.delete_mails_after }} -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/cur -mtime +{{ config.delete_mails_after }} -type f -delete
 # or in any IMAP subfolder
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/.*/cur/*' -mtime +{{ config.delete_mails_after }} -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/.*/cur -mtime +{{ config.delete_mails_after }} -type f -delete
 # even if they are unseen
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/new/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/.*/new/*' -mtime +{{ config.delete_mails_after }} -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/new -mtime +{{ config.delete_mails_after }} -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/.*/new -mtime +{{ config.delete_mails_after }} -type f -delete
 # or only temporary (but then they shouldn't be around after {{ config.delete_mails_after }} days anyway).
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/tmp/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-2 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -path '*/.*/tmp/*' -mtime +{{ config.delete_mails_after }} -type f -delete
-3 0 * * * vmail find /home/vmail/mail/{{ config.mail_domain }} -name 'maildirsize' -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/tmp -mtime +{{ config.delete_mails_after }} -type f -delete
+2 0 * * * dovecot find /home/vmail/mail/{{ config.mail_domain }}/*/.*/tmp -mtime +{{ config.delete_mails_after }} -type f -delete

cmdeploy/src/cmdeploy/dovecot/push_notification.lua

@@ -1,32 +0,0 @@
-function dovecot_lua_notify_begin_txn(user)
-  return user
-end
-
-function contains(v, needle)
-  for _, keyword in ipairs(v) do
-    if keyword == needle then
-      return true
-    end
-  end
-  return false
-end
-
-function dovecot_lua_notify_event_message_new(user, event)
-  local mbox = user:mailbox(event.mailbox)
-  mbox:sync()
-
-  if user.username ~= event.from_address then
-    -- Incoming message
-    if not contains(event.keywords, "$Auto") then
-      -- Not an Auto-Submitted message, notifying.
-
-      -- Notify METADATA server about new message.
-      mbox:metadata_set("/private/messagenew", "")
-    end
-  end
-
-  mbox:free()
-end
-
-function dovecot_lua_notify_end_txn(ctx, success)
-end

cmdeploy/src/cmdeploy/opendkim/KeyTable

@@ -1 +1 @@
-{{ config.opendkim_selector }}._domainkey.{{ config.domain_name }} {{ config.domain_name }}:{{ config.opendkim_selector }}:/etc/dkimkeys/{{ config.opendkim_selector }}.private
+dkim._domainkey.{{ config.domain_name }} {{ config.domain_name }}:{{ config.opendkim_selector }}:/etc/dkimkeys/dkim.private

cmdeploy/src/cmdeploy/opendkim/final.lua

@@ -1,28 +0,0 @@
-if odkim.internal_ip(ctx) == 1 then
-	-- Outgoing message will be signed,
-	-- no need to look for signatures.
-	return nil
-end
-
-nsigs = odkim.get_sigcount(ctx)
-if nsigs == nil then
-	return nil
-end
-
-for i = 1, nsigs do
-        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.
-	-- 
-	-- Any valid signature that was not ignored like this
-	-- means the message is acceptable.
-	if sigres == 0 then
-		return nil
-	end	
-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/opendkim/opendkim.conf

@@ -8,12 +8,10 @@ SyslogSuccess		yes
 # oversigned, because it is often the identity key used by reputation systems
 # and thus somewhat security sensitive.
 Canonicalization	relaxed/simple
+#Mode			sv
+#SubDomains		no
 OversignHeaders		From
 
-On-BadSignature         reject
-On-KeyNotFound          reject
-On-NoSignature          reject
-
 # Signing domain, selector, and key (required). For example, perform signing
 # for domain "example.com" with selector "2020" (2020._domainkey.example.com),
 # using the private key stored in /etc/dkimkeys/example.private. More granular
@@ -24,15 +22,6 @@ KeyFile		  /etc/dkimkeys/{{ config.opendkim_selector }}.private
 KeyTable          /etc/dkimkeys/KeyTable
 SigningTable      refile:/etc/dkimkeys/SigningTable
 
-# Sign Autocrypt header in addition to the default specified in RFC 6376.
-SignHeaders *,+autocrypt
-
-# Script to ignore signatures that do not correspond to the From: domain.
-ScreenPolicyScript /etc/opendkim/screen.lua
-
-# Script to reject mails without a valid DKIM signature.
-FinalPolicyScript /etc/opendkim/final.lua
-
 # In Debian, opendkim runs as user "opendkim". A umask of 007 is required when
 # using a local socket with MTAs that access the socket as a non-privileged
 # user (for example, Postfix). You may need to add user "postfix" to group
@@ -40,10 +29,22 @@ FinalPolicyScript /etc/opendkim/final.lua
 UserID			opendkim
 UMask			007
 
+# Socket for the MTA connection (required). If the MTA is inside a chroot jail,
+# it must be ensured that the socket is accessible. In Debian, Postfix runs in
+# a chroot in /var/spool/postfix, therefore a Unix socket would have to be
+# configured as shown on the last line below.
+#Socket			local:/run/opendkim/opendkim.sock
+#Socket			inet:8891@localhost
+#Socket			inet:8891
 Socket			local:/var/spool/postfix/opendkim/opendkim.sock
 
 PidFile			/run/opendkim/opendkim.pid
 
+# Hosts for which to sign rather than verify, default is 127.0.0.1. See the
+# OPERATION section of opendkim(8) for more information.
+#InternalHosts		192.168.0.0/16, 10.0.0.0/8, 172.16.0.0/12
+
 # The trust anchor enables DNSSEC. In Debian, the trust anchor file is provided
 # by the package dns-root-data.
 TrustAnchorFile		/usr/share/dns/root.key
+#Nameservers		127.0.0.1

cmdeploy/src/cmdeploy/opendkim/screen.lua

@@ -1,21 +0,0 @@
--- Ignore signatures that do not correspond to the From: domain.
-
-from_domain = odkim.get_fromdomain(ctx)
-if from_domain == nil then
-	return nil
-end
-
-n = odkim.get_sigcount(ctx)
-if n == nil then
-	return nil
-end
-
-for i = 1, n do
-	sig = odkim.get_sighandle(ctx, i - 1)
-	sig_domain = odkim.sig_getdomain(sig)
-	if from_domain ~= sig_domain then
-		odkim.sig_ignore(sig)
-	end
-end
-
-return nil

cmdeploy/src/cmdeploy/postfix/login_map

@@ -1 +0,0 @@
-/^(.*)$/	${1}

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

@@ -23,31 +23,6 @@ smtp_tls_CApath=/etc/ssl/certs
 smtp_tls_security_level=may
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtp_tls_policy_maps = socketmap:inet:127.0.0.1:8461:postfix
-smtpd_tls_protocols = >=TLSv1.2
-
-# Disable anonymous cipher suites
-# and known insecure algorithms.
-#
-# Disabling anonymous ciphers
-# does not generally improve security
-# because clients that want to verify certificate
-# will not select them anyway,
-# but makes cipher suite list shorter and security scanners happy.
-# See <https://www.postfix.org/TLS_README.html> for discussion.
-#
-# Only ancient insecure ciphers should be disabled here
-# as MTA clients that do not support more secure cipher
-# likely do not support MTA-STS either and will
-# otherwise fall back to using plaintext connection.
-smtpd_tls_exclude_ciphers = aNULL, RC4, MD5, DES
-
-# Override client's preference order.
-# <https://www.postfix.org/postconf.5.html#tls_preempt_cipherlist>
-#
-# This is mostly to ensure cipher suites with forward secrecy
-# are preferred over non cipher suites without forward secrecy.
-# See <https://www.postfix.org/FORWARD_SECRECY_README.html#server_fs>.
-tls_preempt_cipherlist = yes
 
 smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
 myhostname = {{ config.mail_domain }}
@@ -71,9 +46,5 @@ inet_protocols = all
 virtual_transport = lmtp:unix:private/dovecot-lmtp
 virtual_mailbox_domains = {{ config.mail_domain }}
 
-mua_client_restrictions = permit_sasl_authenticated, reject
-mua_sender_restrictions = reject_sender_login_mismatch, permit_sasl_authenticated, reject
-mua_helo_restrictions = permit_mynetworks, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, permit
-
-# 1:1 map MAIL FROM to SASL login name.
-smtpd_sender_login_maps = regexp:/etc/postfix/login_map
+smtpd_milters = inet:127.0.0.1:11332
+non_smtpd_milters = $smtpd_milters

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

@@ -11,10 +11,13 @@
 # ==========================================================================
 {% if debug == true %}
 smtp      inet  n       -       y       -       -       smtpd -v
-{%- else %}
+{% else %}
 smtp      inet  n       -       y       -       -       smtpd 
-{%- endif %}
-  -o smtpd_milters=unix:opendkim/opendkim.sock
+{% endif %}
+#smtp      inet  n       -       y       -       1       postscreen
+#smtpd     pass  -       -       y       -       -       smtpd
+#dnsblog   unix  -       -       y       -       0       dnsblog
+#tlsproxy  unix  -       -       y       -       0       tlsproxy
 submission inet n       -       y       -       -       smtpd
   -o syslog_name=postfix/submission
   -o smtpd_tls_security_level=encrypt
@@ -79,8 +82,6 @@ filter    unix -        n       n       -       -       lmtp
 # Local SMTP server for reinjecting filered mail.
 localhost:{{ config.postfix_reinject_port }} inet  n       -       n       -       10      smtpd
   -o syslog_name=postfix/reinject
-  -o smtpd_milters=unix:opendkim/opendkim.sock
-  -o cleanup_service_name=authclean
 
 # Cleanup `Received` headers for authenticated mail
 # to avoid leaking client IP.

cmdeploy/src/cmdeploy/rspamd/disabled.conf

@@ -0,0 +1 @@
+enabled = false;

cmdeploy/src/cmdeploy/rspamd/dkim_signing.conf.j2

@@ -0,0 +1,10 @@
+selector = {{ config.dkim_selector }}
+use_esld = false  # don't cut c1.testrun.org down to testrun.org
+domain = {
+    {{ config.mail_domain }} {
+        selectors [
+            selector = {{ config.dkim_selector }}
+            path = {{ config.dkim_key_path }}
+        ]
+    }
+}

cmdeploy/src/cmdeploy/rspamd/force_actions.conf

@@ -0,0 +1,60 @@
+rules {
+    ## Reject on missing or invalid DKIM signatures.
+    ##
+    ## We require DKIM signature on incoming mails regardless of DMARC policy.
+
+    # R_DKIM_REJECT: DKIM reject inserted by `dkim` module.
+    REJECT_INVALID_DKIM {
+        action = "reject";
+        expression = "R_DKIM_REJECT";
+        message = "Rejected due to invalid DKIM signature";
+    }
+
+    # R_DKIM_PERMFAIL: permanent failure inserted by `dkim` module e.g. no DKIM DNS record found.
+    REJECT_PERMFAIL_DKIM {
+        action = "reject";
+        expression = "R_DKIM_PERMFAIL";
+        message = "Rejected due to missing DKIM DNS entry";
+    }
+
+    # No DKIM signature (R_DKIM_NA symbol inserted by `dkim` module).
+    REJECT_MISSING_DKIM {
+        action = "reject";
+        expression = "R_DKIM_NA";
+        message = "Rejected due to missing DKIM signature";
+    }
+
+
+    ## Reject on SPF failure.
+
+    # - SPF failure (R_SPF_FAIL)
+    # - SPF permanent failure, e.g. failed to resolve DNS record referenced from SPF (R_SPF_PERMFAIL)
+    REJECT_SPF {
+        action = "reject";
+        expression = "R_SPF_FAIL | R_SPF_PERMFAIL";
+        message = "Rejected due to failed SPF check";
+    }
+
+    # Reject on DMARC policy check failure.
+    REJECT_DMARC {
+        action = "reject";
+        expression = "DMARC_POLICY_REJECT";
+        message = "Rejected due to DMARC policy";
+    }
+
+
+    # Do not reject if:
+    # - R_DKIM_TEMPFAIL, it is a DNS resolution failure
+    #   and we do not want to lose messages because of faulty network.
+    #
+    # - R_SPF_SOFTFAIL
+    # - R_SPF_NEUTRAL
+    # - R_SPF_DNSFAIL
+    # - R_SPF_NA
+    #
+    # - DMARC_DNSFAIL
+    # - DMARC_NA
+    # - DMARC_POLICY_SOFTFAIL
+    # - DMARC_POLICY_QUARANTINE
+    # - DMARC_BAD_POLICY
+}

cmdeploy/src/cmdeploy/rspamd/options.inc

@@ -0,0 +1 @@
+filters = "dkim";

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

@@ -1,7 +1,6 @@
 import pytest
 import threading
 import queue
-import socket
 
 from chatmaild.config import read_config
 from cmdeploy.cmdeploy import main
@@ -79,24 +78,3 @@ def test_concurrent_logins_same_account(
 
     for _ in conns:
         assert login_results.get()
-
-
-def test_no_vrfy(chatmail_config):
-    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    sock.connect((chatmail_config.mail_domain, 25))
-    banner = sock.recv(1024)
-    print(banner)
-    sock.send(b"VRFY wrongaddress@%s\r\n" % (chatmail_config.mail_domain.encode(),))
-    result = sock.recv(1024)
-    print(result)
-    sock.send(b"VRFY echo@%s\r\n" % (chatmail_config.mail_domain.encode(),))
-    result2 = sock.recv(1024)
-    print(result2)
-    assert result[0:10] == result2[0:10]
-    sock.send(b"VRFY wrongaddress\r\n")
-    result = sock.recv(1024)
-    print(result)
-    sock.send(b"VRFY echo\r\n")
-    result2 = sock.recv(1024)
-    print(result2)
-    assert result[0:10] == result2[0:10] == b"252 2.0.0 "

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

@@ -42,25 +42,13 @@ def test_reject_forged_from(cmsetup, maildata, gencreds, lp, forgeaddr):
     assert "500" in str(e.value)
 
 
-def test_authenticated_from(cmsetup, maildata):
-    """Test that envelope FROM must be the same as login."""
-    user1, user2, user3 = cmsetup.gen_users(3)
-
-    msg = maildata("encrypted.eml", from_addr=user2.addr, to_addr=user3.addr)
-    with pytest.raises(smtplib.SMTPException) as e:
-        user1.smtp.sendmail(
-            from_addr=user2.addr, to_addrs=[user3.addr], msg=msg.as_string()
-        )
-    assert e.value.recipients[user3.addr][0] == 553
-
-
 @pytest.mark.parametrize("from_addr", ["fake@example.org", "fake@testrun.org"])
 def test_reject_missing_dkim(cmsetup, maildata, from_addr):
     """Test that emails with missing or wrong DMARC, DKIM, and SPF entries are rejected."""
     recipient = cmsetup.gen_users(1)[0]
     msg = maildata("plain.eml", from_addr=from_addr, to_addr=recipient.addr).as_string()
     with smtplib.SMTP(cmsetup.maildomain, 25) as s:
-        with pytest.raises(smtplib.SMTPDataError, match="No valid DKIM signature"):
+        with pytest.raises(smtplib.SMTPDataError, match="missing DKIM signature"):
             s.sendmail(from_addr=from_addr, to_addrs=recipient.addr, msg=msg)
 
 
@@ -83,18 +71,3 @@ def test_exceed_rate_limit(cmsetup, gencreds, maildata, chatmail_config):
             assert b"4.7.1: Too much mail from" in outcome[1]
             return
     pytest.fail("Rate limit was not exceeded")
-
-
-def test_expunged(remote, chatmail_config):
-    outdated_days = int(chatmail_config.delete_mails_after) + 1
-    find_cmds = [
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/cur/*' -mtime +{outdated_days} -type f",
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/.*/cur/*' -mtime +{outdated_days} -type f",
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/new/*' -mtime +{outdated_days} -type f",
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/.*/new/*' -mtime +{outdated_days} -type f",
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/tmp/*' -mtime +{outdated_days} -type f",
-        f"find /home/vmail/mail/{chatmail_config.mail_domain} -path '*/.*/tmp/*' -mtime +{outdated_days} -type f",
-    ]
-    for cmd in find_cmds:
-        for line in remote.iter_output(cmd):
-            assert not line

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

@@ -136,15 +136,3 @@ 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):
-    ac = cmfactory.get_online_accounts(1)[0]
-
-    lp.sec(f"Send message to echo@{chatmail_config.mail_domain}")
-    chat = ac.create_chat(f"echo@{chatmail_config.mail_domain}")
-    text = "hi, I hope you text me back"
-    chat.send_text(text)
-    lp.sec("Wait for reply from echobot")
-    reply = ac.wait_next_incoming_message()
-    assert reply.text == text

scripts/initenv.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-python3 -m venv --upgrade-deps venv
+python3 -m venv venv
 
 venv/bin/pip install -e chatmaild 
 venv/bin/pip install -e cmdeploy