some reformatting and striking overall

.github/workflows/ci.yaml

@@ -1,31 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-  push:
-
-jobs:
-  tox:
-    name: chatmail tests
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: run chatmaild tests 
-        working-directory: chatmaild
-        run: pipx run tox
-      - name: run deploy-chatmail offline tests 
-        working-directory: deploy-chatmail
-        run: pipx run tox
-      - name: run deploy-chatmail offline tests 
-        working-directory: deploy-chatmail
-        run: pipx run tox
-
-  scripts:
-    name: chatmail script invocations 
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: run init.sh 
-        run: ./scripts/init.sh 
-      - name: run test.sh 
-        run: ./scripts/test.sh 

.gitignore

@@ -159,5 +159,3 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
-
-chatmail.zone

README.md

@@ -1,61 +1,23 @@
-# Chatmail instances optimized for Delta Chat apps 
+# Chat Mail server configuration
 
-This repository helps to setup a ready-to-use chatmail instance
+This repository setups a ready-to-go chatmail instance
 comprised of a minimal setup of the battle-tested 
-[postfix smtp](https://www.postfix.org) and [dovecot imap](https://www.dovecot.org) services. 
+[postfix smtp server](https://www.postfix.org) and [dovecot imap server](https://www.dovecot.org).
 
-The setup is designed and optimized for providing chatmail accounts 
-for use by [Delta Chat apps](https://delta.chat).
+## Getting started 
 
-Chatmail accounts are automatically created by a first login, 
-after which the initially specified password is required for using them. 
-
-## Getting Started deploying your own chatmail instance
-
-1. Prepare your local (presumably Linux) system:
+1. prepare your local system:
 
     scripts/init.sh 
 
-2. Setup a domain with `A` and `AAAA` records for your chatmail server.
-
-3. Set environment variable to the chatmail domain you want to setup:
+2. set environment variable to the chatmail domain you want to setup:
 
     export CHATMAIL_DOMAIN=c1.testrun.org   # replace with your host
 
-4. Deploy the chat mail instance to your chatmail server: 
+3. run the deploy of the chat mail instance: 
 
     scripts/deploy.sh 
 
-   This script uses `pyinfra` and `ssh` to setup packages and configure
-   the chatmail instance on your remote server. 
-
-5. Run `scripts/generate-dns-zone.sh` and 
-   transfer the generated DNS records at your DNS provider
-
-6. Start a Delta Chat app and create a new account 
-   by typing an e-mail address with an arbitrary username 
-   and `@<your-chatmail-domain>` appended. 
-   Use an at least 10-character random password. 
-
-
-### Ports
-
-Postfix listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
-Dovecot listens on ports 143(imap) and 993 (imaps).
-
-Delta Chat will, however, discover all ports and configurations 
-automatically by reading the `autoconfig.xml` file from the chatmail instance. 
-
-
-## Emergency Commands to disable automatic account creation 
-
-If you need to stop account creation,
-e.g. because some script is wildly creating accounts, run:
-
-    touch /etc/chatmail-nocreate
-
-While this file is present, account creation will be blocked. 
-
 
 ## Running tests and benchmarks (offline and online) 
 
@@ -70,26 +32,28 @@ While this file is present, account creation will be blocked.
 
     scripts/bench.sh 
 
+## Running tests (offline and online) 
 
-## Development Background for chatmail instances 
+```
+## Dovecot/Postfix configuration
 
-This repository drives the development of "chatmail instances", 
-comprised of minimal setups of 
+### Ports
 
-- [postfix smtp server](https://www.postfix.org) 
-- [dovecot imap server](https://www.dovecot.org) 
+Postfix listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
+Dovecot listens on ports 143(imap) and 993 (imaps).
 
-as well as two custom services that are integrated with these two: 
+## DNS
 
-- `chatmaild/src/chatmaild/dictproxy.py` implements 
-  create-on-login account creation semantics and is used
-  by Dovecot during login authentication and by Postfix
-  which in turn uses Dovecot SASL to authenticate users
-  to send mails for them. 
-
-- `chatmaild/src/chatmaild/filtermail.py` prevents 
-  unencrypted e-mail from leaving the chatmail instance
-  and is integrated into postfix's outbound mail pipelines. 
+For DKIM you must add a DNS entry as found in /etc/opendkim/selector.txt on your chatmail instance.
+The above `scripts/deploy.sh` prints out the DKIM selector and DNS entry you
+need to setup with your DNS provider. 
 
+## Emergency Commands
 
+If you need to stop account creation,
+e.g. because some script is wildly creating accounts,
+just run `touch /tmp/nocreate`.
+You can remove the file
+as soon as the attacker was banned
+by different means.
 

chatmaild/pyproject.toml

@@ -20,7 +20,7 @@ addopts = "-v -ra --strict-markers"
 legacy_tox_ini = """
 [tox]
 isolated_build = true
-envlist = lint,py
+envlist = lint
 
 [testenv:lint]
 skipdist = True
@@ -31,10 +31,4 @@ deps =
 commands =
   black --quiet --check --diff src/
   ruff src/
-
-[testenv]
-passenv = CHATMAIL_DOMAIN
-deps = pytest 
-       pdbpp 
-commands = pytest -v -rsXx {posargs: ../tests/chatmaild}
 """

chatmaild/src/chatmaild/dictproxy.py

@@ -2,13 +2,13 @@ import logging
 import os
 import sys
 import json
-import crypt
 from socketserver import (
     UnixStreamServer,
     StreamRequestHandler,
     ThreadingMixIn,
 )
 import pwd
+import subprocess
 
 from .database import Database
 
@@ -16,45 +16,28 @@ NOCREATE_FILE = "/etc/chatmail-nocreate"
 
 
 def encrypt_password(password: str):
+    password = password.encode("ascii")
     # https://doc.dovecot.org/configuration_manual/authentication/password_schemes/
-    passhash = crypt.crypt(password, crypt.METHOD_SHA512)
-    return "{SHA512-CRYPT}" + passhash
-
-
-def is_allowed_to_create(user, cleartext_password) -> bool:
-    """Return True if user and password are admissable."""
-    if os.path.exists(NOCREATE_FILE):
-        logging.warning(f"blocked account creation because {NOCREATE_FILE!r} exists.")
-        return False
-
-    if len(cleartext_password) < 10:
-        logging.warning("Password needs to be at least 10 characters long")
-        return False
-
-    parts = user.split("@")
-    if len(parts) != 2:
-        logging.warning(f"user {user!r} is not a proper e-mail address")
-        return False
-    localpart, domain = parts
-
-    if domain == "nine.testrun.org":
-        # nine.testrun.org policy, username has to be exactly nine chars
-        if len(localpart) != 9:
-            logging.warning(f"localpart {localpart!r} has not exactly nine chars")
-            return False
-
-    return True
-
-
-def create_user(db, user, encrypted_password):
-    with db.write_transaction() as conn:
-        conn.create_user(user, encrypted_password)
-    return dict(
-        home=f"/home/vmail/{user}",
-        uid="vmail",
-        gid="vmail",
-        password=encrypted_password,
+    process = subprocess.Popen(
+        ["doveadm", "pw", "-s", "SHA512-CRYPT"],
+        stdin=subprocess.PIPE,
+        stdout=subprocess.PIPE,
     )
+    stdout_data, _stderr_data = process.communicate(
+        input=password + b"\n" + password + b"\n"
+    )
+    return stdout_data.decode("ascii").strip()
+
+
+def create_user(db, user, password):
+    if os.path.exists(NOCREATE_FILE):
+        logging.warning(
+            f"Didn't create account: {NOCREATE_FILE} exists. Delete the file to enable account creation."
+        )
+        return
+    with db.write_transaction() as conn:
+        conn.create_user(user, password)
+    return dict(home=f"/home/vmail/{user}", uid="vmail", gid="vmail", password=password)
 
 
 def get_user_data(db, user):
@@ -70,18 +53,16 @@ def lookup_userdb(db, user):
     return get_user_data(db, user)
 
 
-def lookup_passdb(db, user, cleartext_password):
+def lookup_passdb(db, user, password):
     userdata = get_user_data(db, user)
     if not userdata:
-        if not is_allowed_to_create(user, cleartext_password):
-            return
-        encrypted_password = encrypt_password(cleartext_password)
-        userdata = create_user(db=db, user=user, encrypted_password=encrypted_password)
+        return create_user(db, user, encrypt_password(password))
     userdata["password"] = userdata["password"].strip()
     return userdata
 
 
 def handle_dovecot_request(msg, db, mail_domain):
+    print(f"received msg: {msg!r}", file=sys.stderr)
     short_command = msg[0]
     if short_command == "L":  # LOOKUP
         parts = msg[1:].split("\t")
@@ -99,11 +80,12 @@ def handle_dovecot_request(msg, db, mail_domain):
                     reply_command = "N"
             elif type == "passdb":
                 if user.endswith(f"@{mail_domain}"):
-                    res = lookup_passdb(db, user, cleartext_password=args[0])
+                    res = lookup_passdb(db, user, password=args[0])
                 if res:
                     reply_command = "O"
                 else:
                     reply_command = "N"
+        print(f"res: {res!r}", file=sys.stderr)
         json_res = json.dumps(res) if res else ""
         return f"{reply_command}{json_res}\n"
     return None
@@ -128,6 +110,7 @@ def main():
                     break
                 res = handle_dovecot_request(msg, db, mail_domain)
                 if res:
+                    print(f"sending result: {res!r}", file=sys.stderr)
                     self.wfile.write(res.encode("ascii"))
                     self.wfile.flush()
 

chatmaild/src/chatmaild/filtermail.py

@@ -1,14 +1,12 @@
 #!/usr/bin/env python3
 import asyncio
 import logging
-import time
-import sys
 from email.parser import BytesParser
 from email import policy
 from email.utils import parseaddr
 
-from aiosmtpd.smtp import SMTP
-from aiosmtpd.controller import Controller
+from aiosmtpd.lmtp import LMTP
+from aiosmtpd.controller import UnixSocketController
 from smtplib import SMTP as SMTPClient
 
 
@@ -34,124 +32,94 @@ def check_encrypted(message):
     return True
 
 
-def check_mdn(message, envelope):
-    if len(envelope.rcpt_tos) != 1:
-        return False
-
-    for name in ["auto-submitted", "chat-version"]:
-        if not message.get(name):
-            return False
-
-    if message.get_content_type() != "multipart/report":
-        return False
-
-    body = message.get_body()
-    if body.get_content_type() != "text/plain":
-        return False
-
-    if list(body.iter_attachments()) or list(body.iter_parts()):
-        return False
-
-    # even with all mime-structural checks an attacker
-    # could try to abuse the subject or body to contain links or other
-    # annoyance -- we skip on checking subject/body for now as Delta Chat
-    # should evolve to create E2E-encrypted read receipts anyway.
-    # and then MDNs are just encrypted mail and can pass the border
-    # to other instances.
-
-    return True
-
-
-class SMTPController(Controller):
+class ExampleController(UnixSocketController):
     def factory(self):
-        return SMTP(self.handler, **self.SMTP_kwargs)
+        return LMTP(self.handler, **self.SMTP_kwargs)
 
 
-class BeforeQueueHandler:
-    def __init__(self):
-        self.send_rate_limiter = SendRateLimiter()
-
-    async def handle_MAIL(self, server, session, envelope, address, mail_options):
-        logging.info(f"handle_MAIL from {address}")
-        envelope.mail_from = address
-        if not self.send_rate_limiter.is_sending_allowed(address):
-            return f"450 4.7.1: Too much mail from {address}"
-
-        parts = envelope.mail_from.split("@")
-        if len(parts) != 2:
-            return f"500 Invalid from address <{envelope.mail_from!r}>"
-
+class ExampleHandler:
+    async def handle_RCPT(self, server, session, envelope, address, rcpt_options):
+        envelope.rcpt_tos.append(address)
         return "250 OK"
 
     async def handle_DATA(self, server, session, envelope):
-        logging.info("handle_DATA before-queue")
-        error = check_DATA(envelope)
-        if error:
-            return error
-        logging.info("re-injecting the mail that passed checks")
-        client = SMTPClient("localhost", "10025")
-        client.sendmail(envelope.mail_from, envelope.rcpt_tos, envelope.content)
-        return "250 OK"
+        valid_recipients, res = lmtp_handle_DATA(envelope)
+        # Reinject the mail back into Postfix.
+        if valid_recipients:
+            logging.info("Reinjecting the mail")
+            client = SMTPClient("localhost", "10026")
+            client.sendmail(envelope.mail_from, valid_recipients, envelope.content)
+        else:
+            logging.info("no valid recipients, ignoring mail")
+
+        return "\r\n".join(res)
 
 
-async def asyncmain_beforequeue(port):
-    Controller(BeforeQueueHandler(), hostname="127.0.0.1", port=port).start()
+async def asyncmain(loop):
+    controller = ExampleController(
+        ExampleHandler(), unix_socket="/var/spool/postfix/private/filtermail"
+    )
+    controller.start()
 
 
-def check_DATA(envelope):
+def lmtp_handle_DATA(envelope):
     """the central filtering function for e-mails."""
     logging.info(f"Processing DATA message from {envelope.mail_from}")
 
     message = BytesParser(policy=policy.default).parsebytes(envelope.content)
     mail_encrypted = check_encrypted(message)
 
-    _, from_addr = parseaddr(message.get("from").strip())
-    logging.info(f"mime-from: {from_addr} envelope-from: {envelope.mail_from!r}")
-    if envelope.mail_from.lower() != from_addr.lower():
-        return f"500 Invalid FROM <{from_addr!r}> for <{envelope.mail_from!r}>"
-
-    if not mail_encrypted and check_mdn(message, envelope):
-        return
-
-    envelope_from_domain = from_addr.split("@").pop()
+    valid_recipients = []
+    res = []
     for recipient in envelope.rcpt_tos:
+        my_local_domain = envelope.mail_from.split("@")
+        if len(my_local_domain) != 2:
+            res += [f"500 Invalid from address <{envelope.mail_from}>"]
+            continue
+
+        _, from_addr = parseaddr(message.get("from").strip())
+        logging.info(f"mime-from: {from_addr} envelope-from: {envelope.mail_from}")
+        if envelope.mail_from.lower() != from_addr.lower():
+            res += [f"500 Invalid FROM <{from_addr}> for <{envelope.mail_from}>"]
+            continue
+
         if envelope.mail_from == recipient:
             # Always allow sending emails to self.
+            valid_recipients += [recipient]
+            res += ["250 OK"]
             continue
-        res = recipient.split("@")
-        if len(res) != 2:
-            return f"500 Invalid address <{recipient}>"
-        _recipient_addr, recipient_domain = res
 
-        is_outgoing = recipient_domain != envelope_from_domain
-        if is_outgoing and not mail_encrypted:
-            is_securejoin = message.get("secure-join") in ["vc-request", "vg-request"]
-            if not is_securejoin:
-                return f"500 Invalid unencrypted mail to <{recipient}>"
+        recipient_local_domain = recipient.split("@")
+        if len(recipient_local_domain) != 2:
+            res += [f"500 Invalid address <{recipient}>"]
+            continue
 
+        is_outgoing = recipient_local_domain[1] != my_local_domain[1]
 
-class SendRateLimiter:
-    MAX_USER_SEND_PER_MINUTE = 80
+        if (
+            is_outgoing
+            and not mail_encrypted
+            and message.get("secure-join") != "vc-request"
+            and message.get("secure-join") != "vg-request"
+        ):
+            res += ["500 Outgoing mail must be encrypted"]
+            continue
 
-    def __init__(self):
-        self.addr2timestamps = {}
+        valid_recipients += [recipient]
+        res += ["250 OK"]
 
-    def is_sending_allowed(self, mail_from):
-        last = self.addr2timestamps.setdefault(mail_from, [])
-        now = time.time()
-        last[:] = [ts for ts in last if ts >= (now - 60)]
-        if len(last) <= self.MAX_USER_SEND_PER_MINUTE:
-            last.append(now)
-            return True
-        return False
+    assert len(envelope.rcpt_tos) == len(res)
+    assert len(valid_recipients) <= len(res)
+    return valid_recipients, res
 
 
 def main():
-    args = sys.argv[1:]
-    assert len(args) == 1
     logging.basicConfig(level=logging.INFO)
     loop = asyncio.new_event_loop()
     asyncio.set_event_loop(loop)
-    task = asyncmain_beforequeue(port=int(args[0]))
-    loop.create_task(task)
+    loop.create_task(asyncmain(loop=loop))
     loop.run_forever()
+
+
+if __name__ == "__main__":
+    main()

chatmaild/src/chatmaild/filtermail.service

@@ -1,8 +1,8 @@
 [Unit]
-Description=Chatmail Postfix BeforeQeue filter 
+Description=Email filter for chatmail servers
 
 [Service]
-ExecStart=/usr/local/bin/filtermail 10080
+ExecStart=/usr/local/bin/filtermail
 Restart=always
 RestartSec=30
 

chatmaild/src/chatmaild/test_doveauth.py

@@ -0,0 +1,53 @@
+import os
+
+import pytest
+
+import chatmaild.dictproxy
+from .dictproxy import get_user_data, lookup_passdb
+from .database import Database, DBError
+
+
+@pytest.fixture()
+def db(tmpdir):
+    db_path = tmpdir / "passdb.sqlite"
+    print("database path:", db_path)
+    return Database(db_path)
+
+
+def test_basic(db):
+    chatmaild.dictproxy.NOCREATE_FILE = "/tmp/nocreate"
+    if os.path.exists(chatmaild.dictproxy.NOCREATE_FILE):
+        os.remove(chatmaild.dictproxy.NOCREATE_FILE)
+    lookup_passdb(db, "link2xt@c1.testrun.org", "asdf")
+    data = get_user_data(db, "link2xt@c1.testrun.org")
+    assert data
+
+
+def test_dont_overwrite_password_on_wrong_login(db):
+    """Test that logging in with a different password doesn't create a new user"""
+    res = lookup_passdb(db, "newuser1@something.org", "kajdlkajsldk12l3kj1983")
+    assert res["password"]
+    res2 = lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
+    # this function always returns a password hash, which is actually compared by dovecot.
+    assert res["password"] == res2["password"]
+
+
+def test_nocreate_file(db):
+    chatmaild.dictproxy.NOCREATE_FILE = "/tmp/nocreate"
+    with open(chatmaild.dictproxy.NOCREATE_FILE, "w+") as f:
+        f.write("")
+    assert os.path.exists(chatmaild.dictproxy.NOCREATE_FILE)
+    lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
+    assert not get_user_data(db, "newuser1@something.org")
+    os.remove(chatmaild.dictproxy.NOCREATE_FILE)
+
+
+def test_db_version(db):
+    assert db.get_schema_version() == 1
+
+
+def test_too_high_db_version(db):
+    with db.write_transaction() as conn:
+        conn.execute("PRAGMA user_version=%s;" % (999,))
+    with pytest.raises(DBError):
+        db.ensure_tables()

chatmaild/src/chatmaild/test_filtermail.py

@@ -0,0 +1,328 @@
+from .filtermail import check_encrypted, lmtp_handle_DATA
+from email.parser import BytesParser
+from email import policy
+
+
+def test_reject_forged_from():
+    def makemail(from_addr):
+        return BytesParser(policy=policy.default).parsebytes(
+            "\r\n".join(
+                [
+                    f"From: <{from_addr}",
+                    "To: <barbaz@c3.testrun.org>",
+                    "Date: Sun, 15 Oct 2023 16:41:44 +0000",
+                    "Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                    "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                    "Chat-Version: 1.0",
+                    "MIME-Version: 1.0",
+                    "Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no",
+                    "",
+                    "Hi!",
+                    "",
+                    "",
+                ]
+            ).encode()
+        )
+
+    class envelope:
+        mail_from = "bob@c3.testrun.org"
+        rcpt_tos = ["somebody@c3.testrun.org"]
+
+    # test that the filter lets good mail through
+    envelope.content = makemail(envelope.mail_from).as_bytes()
+    valid_recipients, res = lmtp_handle_DATA(envelope=envelope)
+    assert valid_recipients == envelope.rcpt_tos
+    assert len(res) == 1 and "250" in res[0]
+
+    # test that the filter rejects forged mail
+    envelope.content = makemail("forged@c3.testrun.org").as_bytes()
+    valid_recipients, res = lmtp_handle_DATA(envelope=envelope)
+    assert not valid_recipients
+    assert len(res) == 1 and "500" in res[0]
+
+
+def test_filtermail():
+    def check_encrypted_bstr(content):
+        message = BytesParser(policy=policy.default).parsebytes(content)
+        return check_encrypted(message)
+
+    assert not check_encrypted_bstr(b"foo")
+
+    assert not check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: =?utf-8?q?Message_from_foobar=40c2=2Etestrun=2Eorg?=",
+                "Chat-Disposition-Notification-To: foobar@c2.testrun.org",
+                "Chat-User-Avatar: 0",
+                "From: <foobar@c2.testrun.org>",
+                "To: <barbaz@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:41:44 +0000",
+                "Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "Chat-Version: 1.0",
+                "Autocrypt: addr=foobar@c2.testrun.org; prefer-encrypt=mutual;",
+                "\tkeydata=xjMEZSrw3hYJKwYBBAHaRw8BAQdAiEKNQFU28c6qsx4vo/JHdt73RXdjMOmByf/XsGiJ7m",
+                "\tnNFzxmb29iYXJAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUq8N4CGwMECwkIBwYVCAkKCwID",
+                "\tFgIBFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJCX3gEAhm0MehE5byBBU1avPczr/I",
+                "\tHjNLht7Qf6++mAhlJmtDcA/0C8VYJhsUpmiDjuZaMDWNv4FO2BJG6LH7gSm6n7ClMJzjgEZSrw3hIK",
+                "\tKwYBBAGXVQEFAQEHQAxGG/QW0owCfMp1A+vXEMwgzWcBpNFr58kX2eXuPpM6AwEIB8J4BBgWCAAgBQ",
+                "\tJlKvDeAhsMFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJDg1gEAwLf8KDoAAKyYgjyI",
+                "\tvYvO9VEgBni1C4Xx1VjcaEmlDK8BALoFuUCK+enw76TtDcAUKhlhUiM6SDRExkS4Nskp/BcK",
+                "MIME-Version: 1.0",
+                "Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no",
+                "",
+                "Hi!",
+                "",
+                "",
+            ]
+        ).encode()
+    )
+
+    assert not check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: =?utf-8?q?Message_from_foobar=40c2=2Etestrun=2Eorg?=",
+                "Chat-Disposition-Notification-To: foobar@c2.testrun.org",
+                "Chat-User-Avatar: 0",
+                "From: <foobar@c2.testrun.org>",
+                "To: <barbaz@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:41:44 +0000",
+                "Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "Chat-Version: 1.0",
+                "Autocrypt: addr=foobar@c2.testrun.org; prefer-encrypt=mutual;",
+                "\tkeydata=xjMEZSrw3hYJKwYBBAHaRw8BAQdAiEKNQFU28c6qsx4vo/JHdt73RXdjMOmByf/XsGiJ7m",
+                "\tnNFzxmb29iYXJAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUq8N4CGwMECwkIBwYVCAkKCwID",
+                "\tFgIBFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJCX3gEAhm0MehE5byBBU1avPczr/I",
+                "\tHjNLht7Qf6++mAhlJmtDcA/0C8VYJhsUpmiDjuZaMDWNv4FO2BJG6LH7gSm6n7ClMJzjgEZSrw3hIK",
+                "\tKwYBBAGXVQEFAQEHQAxGG/QW0owCfMp1A+vXEMwgzWcBpNFr58kX2eXuPpM6AwEIB8J4BBgWCAAgBQ",
+                "\tJlKvDeAhsMFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJDg1gEAwLf8KDoAAKyYgjyI",
+                "\tvYvO9VEgBni1C4Xx1VjcaEmlDK8BALoFuUCK+enw76TtDcAUKhlhUiM6SDRExkS4Nskp/BcK",
+                "MIME-Version: 1.0",
+                "Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no",
+                "",
+                "Hi!",
+                "",
+                "",
+            ]
+        ).encode()
+    )
+
+    # https://xkcd.com/1181/
+    assert not check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: =?utf-8?q?Message_from_foobar=40c2=2Etestrun=2Eorg?=",
+                "Chat-Disposition-Notification-To: foobar@c2.testrun.org",
+                "Chat-User-Avatar: 0",
+                "From: <foobar@c2.testrun.org>",
+                "To: <barbaz@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:41:44 +0000",
+                "Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "Chat-Version: 1.0",
+                "Autocrypt: addr=foobar@c2.testrun.org; prefer-encrypt=mutual;",
+                "\tkeydata=xjMEZSrw3hYJKwYBBAHaRw8BAQdAiEKNQFU28c6qsx4vo/JHdt73RXdjMOmByf/XsGiJ7m",
+                "\tnNFzxmb29iYXJAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUq8N4CGwMECwkIBwYVCAkKCwID",
+                "\tFgIBFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJCX3gEAhm0MehE5byBBU1avPczr/I",
+                "\tHjNLht7Qf6++mAhlJmtDcA/0C8VYJhsUpmiDjuZaMDWNv4FO2BJG6LH7gSm6n7ClMJzjgEZSrw3hIK",
+                "\tKwYBBAGXVQEFAQEHQAxGG/QW0owCfMp1A+vXEMwgzWcBpNFr58kX2eXuPpM6AwEIB8J4BBgWCAAgBQ",
+                "\tJlKvDeAhsMFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJDg1gEAwLf8KDoAAKyYgjyI",
+                "\tvYvO9VEgBni1C4Xx1VjcaEmlDK8BALoFuUCK+enw76TtDcAUKhlhUiM6SDRExkS4Nskp/BcK",
+                "MIME-Version: 1.0",
+                "Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no",
+                "",
+                "-----BEGIN PGP MESSAGE-----",
+                "Hi!",
+                "-----END PGP MESSAGE-----",
+                "",
+                "",
+            ]
+        ).encode()
+    )
+
+    assert check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: ...",
+                "From: <barbaz@c2.testrun.org>",
+                "To: <foobar@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:43:21 +0000",
+                "Message-ID: <Mr.UVyJWZmkCKM.hGzNc6glBE_@c2.testrun.org>",
+                "In-Reply-To: <Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>",
+                "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "\t<Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>",
+                "Chat-Version: 1.0",
+                "Autocrypt: addr=barbaz@c2.testrun.org; prefer-encrypt=mutual;",
+                "\tkeydata=xjMEZSwWjhYJKwYBBAHaRw8BAQdAQBEhqeJh0GueHB6kF/DUQqYCxARNBVokg/AzT+7LqH",
+                "\trNFzxiYXJiYXpAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUsFo4CGwMECwkIBwYVCAkKCwID",
+                "\tFgIBFiEEFTfUNvVnY3b9F7yHnmme1PfUhX8ACgkQnmme1PfUhX9A4AEAnHWHp49eBCMHK5t66gYPiW",
+                "\tXQuB1mwUjzGfYWB+0RXUoA/0xcQ3FbUNlGKW7Blp6eMFfViv6Mv2d3kNSXACB6nmcMzjgEZSwWjhIK",
+                "\tKwYBBAGXVQEFAQEHQBpY5L2M1XHo0uxf8SX1wNLBp/OVvidoWHQF2Jz+kJsUAwEIB8J4BBgWCAAgBQ",
+                "\tJlLBaOAhsMFiEEFTfUNvVnY3b9F7yHnmme1PfUhX8ACgkQnmme1PfUhX/INgEA37AJaNvruYsJVanP",
+                "\tIXnYw4CKd55UAwl8Zcy+M2diAbkA/0fHHcGV4r78hpbbL1Os52DPOdqYQRauIeJUeG+G6bQO",
+                "MIME-Version: 1.0",
+                'Content-Type: multipart/encrypted; protocol="application/pgp-encrypted";',
+                '\tboundary="YFrteb74qSXmggbOxZL9dRnhymywAi"',
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi",
+                "Content-Description: PGP/MIME version identification",
+                "Content-Type: application/pgp-encrypted",
+                "",
+                "Version: 1",
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi",
+                "Content-Description: OpenPGP encrypted message",
+                'Content-Disposition: inline; filename="encrypted.asc";',
+                'Content-Type: application/octet-stream; name="encrypted.asc"',
+                "",
+                "-----BEGIN PGP MESSAGE-----",
+                "",
+                "wU4DhW3gBZ/VvCYSAQdA8bMs2spwbKdGjVsL1ByPkNrqD7frpB73maeL6I6SzDYg",
+                "O5G53tv339RdKq3WRcCtEEvxjHlUx2XNwXzC04BpmfvBTgNfPUyLDzjXnxIBB0Ae",
+                "8ymwGvXMCCimHXN0Dg8Ui62KOi03h0UgheoHWovJSCDF4CKre/xtFr3nL7lq/PKI",
+                "JsjVNz7/RK9FSXF6WwfONtLCyQGEuVAsB/KXfCBEyfKhaMwGHvhujRidGW5uV1no",
+                "lMGl3ODmo29Lgeu2uSE7EpJRZoe6hU6ddmBkqxax61ZtkaFlGFFpdo2K8balNNdz",
+                "ZsJ/9mmI9x3oOJ4/l1nhQbUO9ADbs7gJhFdV5Qkp30b5fCI7bU+aoe1ccBbLe/WM",
+                "YUty1PqcuQT7XjA+XmYuL261tvW8pBetT+i33/E2d8PzzYt2IuK9qeevyS+yxdwA",
+                "kfwejFWzzsUlJaDxs1x4XOxkMgSj+jo+g12dFOb7fyClsAnq23iDb8AuaT/BScAI",
+                "+lO+gher69+6LmM7VGHLG5k762J1jTaQCaKt1s8TAWV99Eo4491vL6fyvk3l/Cfg",
+                "RXSwiWFgj19Pn0Rq7CD9v22UE2vdUMBTcV4aw79mClk1YQ23jbF0y5DCjPdJ62Zo",
+                "tskBgFt3NoWV80jZ76zIBLrrjLwCCll8JjJtFwSkt2GX5RFBsVa4A8IDht9RtEk7",
+                "rrHgbSZQfkauEi/mH3/6CDZoLqSHudUZ7d4MaJwun1TkFYGe2ORwGJd4OBj3oGJp",
+                "H8YBwCpk///L/fKjX0Gg3M8nrpM4wrRFhPKidAgO/kcm25X4+ZHlVkWBTCt5RWKI",
+                "fHh6oLDZCqCfcgMkE1KKmwfIHaUkhq5BPRigwy6i5dh1DM4+1UCLh3dxzVbqE9b9",
+                "61NB19nXdRtDA2sOUnj9ve6m/wEPyCb6/zBQZqvCBYb1/AjdXpUrFT+DbpfyxaXN",
+                "XfhDVb5mNqNM/IVj0V5fvTc6vOfYbzQtPm10H+FdWWfb+rJRfyC3MA2w2IqstFe3",
+                "w3bu2iE6CQvSqRvge+ZqLKt/NqYwOURiUmpuklbl3kPJ97+mfKWoiqk8Iz1VY+bb",
+                "NMUC7aoGv+jcoj+WS6PYO8N6BeRVUUB3ZJSf8nzjgxm1/BcM+UD3BPrlhT11ODRs",
+                "baifGbprMWwt3dhb8cQgRT8GPdpO1OsDkzL6iikMjLHWWiA99GV6ruiHsIPw6boW",
+                "A6/uSOskbDHOROotKmddGTBd0iiHXAoQsJFt1ZjUkt6EHrgWs+GAvrvKpXs1mrz8",
+                "uj3GwEFrHS+Xuf2UDgpszYT3hI2cL/kUtGakVR7m7vVMZqXBUbZdGAEb1PZNPwsI",
+                "E4aMK02+EVB+tSN4Fzj99N2YD0inVYt+oPjr2tHhUS6aSGBNS/48Ki47DOg4Sxkn",
+                "lkOWnEbCD+XTnbDd",
+                "=agR5",
+                "-----END PGP MESSAGE-----",
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi--",
+                "",
+                "",
+            ]
+        ).encode()
+    )
+
+    assert not check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: Buy Penis Enlargement at www.malicious-domain.com",
+                "From: <barbaz@c2.testrun.org>",
+                "To: <foobar@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:43:21 +0000",
+                "Message-ID: <Mr.UVyJWZmkCKM.hGzNc6glBE_@c2.testrun.org>",
+                "In-Reply-To: <Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>",
+                "References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>",
+                "\t<Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>",
+                "Chat-Version: 1.0",
+                "Autocrypt: addr=barbaz@c2.testrun.org; prefer-encrypt=mutual;",
+                "\tkeydata=xjMEZSwWjhYJKwYBBAHaRw8BAQdAQBEhqeJh0GueHB6kF/DUQqYCxARNBVokg/AzT+7LqH",
+                "\trNFzxiYXJiYXpAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUsFo4CGwMECwkIBwYVCAkKCwID",
+                "\tFgIBFiEEFTfUNvVnY3b9F7yHnmme1PfUhX8ACgkQnmme1PfUhX9A4AEAnHWHp49eBCMHK5t66gYPiW",
+                "\tXQuB1mwUjzGfYWB+0RXUoA/0xcQ3FbUNlGKW7Blp6eMFfViv6Mv2d3kNSXACB6nmcMzjgEZSwWjhIK",
+                "\tKwYBBAGXVQEFAQEHQBpY5L2M1XHo0uxf8SX1wNLBp/OVvidoWHQF2Jz+kJsUAwEIB8J4BBgWCAAgBQ",
+                "\tJlLBaOAhsMFiEEFTfUNvVnY3b9F7yHnmme1PfUhX8ACgkQnmme1PfUhX/INgEA37AJaNvruYsJVanP",
+                "\tIXnYw4CKd55UAwl8Zcy+M2diAbkA/0fHHcGV4r78hpbbL1Os52DPOdqYQRauIeJUeG+G6bQO",
+                "MIME-Version: 1.0",
+                'Content-Type: multipart/encrypted; protocol="application/pgp-encrypted";',
+                '\tboundary="YFrteb74qSXmggbOxZL9dRnhymywAi"',
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi",
+                "Content-Description: PGP/MIME version identification",
+                "Content-Type: application/pgp-encrypted",
+                "",
+                "Version: 1",
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi",
+                "Content-Description: OpenPGP encrypted message",
+                'Content-Disposition: inline; filename="encrypted.asc";',
+                'Content-Type: application/octet-stream; name="encrypted.asc"',
+                "",
+                "-----BEGIN PGP MESSAGE-----",
+                "",
+                "wU4DhW3gBZ/VvCYSAQdA8bMs2spwbKdGjVsL1ByPkNrqD7frpB73maeL6I6SzDYg",
+                "O5G53tv339RdKq3WRcCtEEvxjHlUx2XNwXzC04BpmfvBTgNfPUyLDzjXnxIBB0Ae",
+                "8ymwGvXMCCimHXN0Dg8Ui62KOi03h0UgheoHWovJSCDF4CKre/xtFr3nL7lq/PKI",
+                "JsjVNz7/RK9FSXF6WwfONtLCyQGEuVAsB/KXfCBEyfKhaMwGHvhujRidGW5uV1no",
+                "lMGl3ODmo29Lgeu2uSE7EpJRZoe6hU6ddmBkqxax61ZtkaFlGFFpdo2K8balNNdz",
+                "ZsJ/9mmI9x3oOJ4/l1nhQbUO9ADbs7gJhFdV5Qkp30b5fCI7bU+aoe1ccBbLe/WM",
+                "YUty1PqcuQT7XjA+XmYuL261tvW8pBetT+i33/E2d8PzzYt2IuK9qeevyS+yxdwA",
+                "kfwejFWzzsUlJaDxs1x4XOxkMgSj+jo+g12dFOb7fyClsAnq23iDb8AuaT/BScAI",
+                "+lO+gher69+6LmM7VGHLG5k762J1jTaQCaKt1s8TAWV99Eo4491vL6fyvk3l/Cfg",
+                "RXSwiWFgj19Pn0Rq7CD9v22UE2vdUMBTcV4aw79mClk1YQ23jbF0y5DCjPdJ62Zo",
+                "tskBgFt3NoWV80jZ76zIBLrrjLwCCll8JjJtFwSkt2GX5RFBsVa4A8IDht9RtEk7",
+                "rrHgbSZQfkauEi/mH3/6CDZoLqSHudUZ7d4MaJwun1TkFYGe2ORwGJd4OBj3oGJp",
+                "H8YBwCpk///L/fKjX0Gg3M8nrpM4wrRFhPKidAgO/kcm25X4+ZHlVkWBTCt5RWKI",
+                "fHh6oLDZCqCfcgMkE1KKmwfIHaUkhq5BPRigwy6i5dh1DM4+1UCLh3dxzVbqE9b9",
+                "61NB19nXdRtDA2sOUnj9ve6m/wEPyCb6/zBQZqvCBYb1/AjdXpUrFT+DbpfyxaXN",
+                "XfhDVb5mNqNM/IVj0V5fvTc6vOfYbzQtPm10H+FdWWfb+rJRfyC3MA2w2IqstFe3",
+                "w3bu2iE6CQvSqRvge+ZqLKt/NqYwOURiUmpuklbl3kPJ97+mfKWoiqk8Iz1VY+bb",
+                "NMUC7aoGv+jcoj+WS6PYO8N6BeRVUUB3ZJSf8nzjgxm1/BcM+UD3BPrlhT11ODRs",
+                "baifGbprMWwt3dhb8cQgRT8GPdpO1OsDkzL6iikMjLHWWiA99GV6ruiHsIPw6boW",
+                "A6/uSOskbDHOROotKmddGTBd0iiHXAoQsJFt1ZjUkt6EHrgWs+GAvrvKpXs1mrz8",
+                "uj3GwEFrHS+Xuf2UDgpszYT3hI2cL/kUtGakVR7m7vVMZqXBUbZdGAEb1PZNPwsI",
+                "E4aMK02+EVB+tSN4Fzj99N2YD0inVYt+oPjr2tHhUS6aSGBNS/48Ki47DOg4Sxkn",
+                "lkOWnEbCD+XTnbDd",
+                "=agR5",
+                "-----END PGP MESSAGE-----",
+                "",
+                "",
+                "--YFrteb74qSXmggbOxZL9dRnhymywAi--",
+                "",
+                "",
+            ]
+        ).encode()
+    )
+
+    assert not check_encrypted_bstr(
+        "\r\n".join(
+            [
+                "Subject: Message opened",
+                "From: <barbaz@c2.testrun.org>",
+                "To: <foobar@c2.testrun.org>",
+                "Date: Sun, 15 Oct 2023 16:43:25 +0000",
+                "Message-ID: <Mr.78MWtlV7RAi.goCFzBhCYfy@c2.testrun.org>",
+                "Auto-Submitted: auto-replied",
+                "Chat-Version: 1.0",
+                "MIME-Version: 1.0",
+                "Content-Type: multipart/report; report-type=disposition-notification;",
+                '\tboundary="Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi"',
+                "",
+                "",
+                "--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi",
+                "Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no",
+                "",
+                'The "Hi!" message you sent was displayed on the screen of the recipient.',
+                "",
+                "This is no guarantee the content was read.",
+                "",
+                "",
+                "--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi",
+                "Content-Type: message/disposition-notification",
+                "",
+                "Reporting-UA: Delta Chat 1.124.1",
+                "Original-Recipient: rfc822;barbaz@c2.testrun.org",
+                "Final-Recipient: rfc822;barbaz@c2.testrun.org",
+                "Original-Message-ID: <Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>",
+                "Disposition: manual-action/MDN-sent-automatically; displayed",
+                "",
+                "",
+                "--Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi--",
+                "",
+                "",
+            ]
+        ).encode()
+    )

deploy-chatmail/src/deploy_chatmail/__init__.py

@@ -4,8 +4,8 @@ Chat Mail pyinfra deploy.
 import importlib.resources
 from pathlib import Path
 
-from pyinfra import host
-from pyinfra.operations import apt, files, server, systemd
+from pyinfra import host, logger
+from pyinfra.operations import apt, files, server, systemd, python
 from pyinfra.facts.files import File
 from .acmetool import deploy_acmetool
 
@@ -34,28 +34,43 @@ def _install_chatmaild() -> None:
             commands=[f"pip install --break-system-packages {remote_path}"],
         )
 
-        for fn in (
-            "doveauth-dictproxy",
-            "filtermail",
-        ):
-            files.put(
-                name=f"Upload {fn}.service",
-                src=importlib.resources.files("chatmaild")
-                .joinpath(f"{fn}.service")
-                .open("rb"),
-                dest=f"/etc/systemd/system/{fn}.service",
-                user="root",
-                group="root",
-                mode="644",
-            )
-            systemd.service(
-                name=f"Setup {fn} service",
-                service=f"{fn}.service",
-                running=True,
-                enabled=True,
-                restarted=True,
-                daemon_reload=True,
-            )
+        files.put(
+            name="upload doveauth-dictproxy.service",
+            src=importlib.resources.files("chatmaild")
+            .joinpath("doveauth-dictproxy.service")
+            .open("rb"),
+            dest="/etc/systemd/system/doveauth-dictproxy.service",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        systemd.service(
+            name="Setup doveauth-dictproxy service",
+            service="doveauth-dictproxy.service",
+            running=True,
+            enabled=True,
+            restarted=True,
+            daemon_reload=True,
+        )
+
+        files.put(
+            name="upload filtermail.service",
+            src=importlib.resources.files("chatmaild")
+            .joinpath("filtermail.service")
+            .open("rb"),
+            dest="/etc/systemd/system/filtermail.service",
+            user="root",
+            group="root",
+            mode="644",
+        )
+        systemd.service(
+            name="Setup filtermail service",
+            service="filtermail.service",
+            running=True,
+            enabled=True,
+            restarted=True,
+            daemon_reload=True,
+        )
 
 
 def _configure_opendkim(domain: str, dkim_selector: str) -> bool:
@@ -70,36 +85,6 @@ def _configure_opendkim(domain: str, dkim_selector: str) -> bool:
         mode="644",
         config={"domain_name": domain, "opendkim_selector": dkim_selector},
     )
-    need_restart |= main_config.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",
@@ -120,6 +105,8 @@ def _configure_opendkim(domain: str, dkim_selector: str) -> bool:
             _sudo_user="opendkim",
         )
 
+    need_restart |= main_config.changed
+
     return need_restart
 
 
@@ -183,17 +170,6 @@ def _configure_dovecot(mail_server: str, debug: bool = False) -> bool:
         mode="644",
     )
 
-    # as per https://doc.dovecot.org/configuration_manual/os/
-    # it is recommended to set the following inotify limits
-    for name in ("max_user_instances", "max_user_watches"):
-        key = f"fs.inotify.{name}"
-        server.sysctl(
-            name=f"Change {key}",
-            key=key,
-            value=65535,
-            persist=True,
-        )
-
     return need_restart
 
 
@@ -202,7 +178,7 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
     need_restart = False
 
     main_config = files.template(
-        src=importlib.resources.files(__package__).joinpath("nginx/nginx.conf.j2"),
+        src=importlib.resources.files(__package__).joinpath("nginx.conf.j2"),
         dest="/etc/nginx/nginx.conf",
         user="root",
         group="root",
@@ -212,7 +188,7 @@ def _configure_nginx(domain: str, debug: bool = False) -> bool:
     need_restart |= main_config.changed
 
     autoconfig = files.template(
-        src=importlib.resources.files(__package__).joinpath("nginx/autoconfig.xml.j2"),
+        src=importlib.resources.files(__package__).joinpath("autoconfig.xml.j2"),
         dest="/var/www/html/.well-known/autoconfig/mail/config-v1.1.xml",
         user="root",
         group="root",
@@ -277,12 +253,6 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
     opendkim_need_restart = _configure_opendkim(mail_domain, dkim_selector)
     nginx_need_restart = _configure_nginx(mail_domain)
 
-    # deploy web pages and info if we have them
-    pkg_root = importlib.resources.files(__package__)
-    www_path = pkg_root.joinpath(f"../../../www/{mail_domain}").resolve()
-    if www_path.is_dir():
-        files.rsync(f"{www_path}/", "/var/www/html", flags=["-avz"])
-
     systemd.service(
         name="Start and enable OpenDKIM",
         service="opendkim.service",
@@ -322,18 +292,13 @@ def deploy_chatmail(mail_domain: str, mail_server: str, dkim_selector: str) -> N
         commands=[f"echo {mail_domain} >/etc/mailname; chmod 644 /etc/mailname"],
     )
 
-    journald_conf = files.put(
-        name="Configure journald",
-        src=importlib.resources.files(__package__).joinpath("journald.conf"),
-        dest="/etc/systemd/journald.conf",
-        user="root",
-        group="root",
-        mode="644",
-    )
-    systemd.service(
-        name="Start and enable journald",
-        service="systemd-journald.service",
-        running=True,
-        enabled=True,
-        restarted=journald_conf,
-    )
+    def callback():
+        result = server.shell(
+            commands=[
+                f"""sed 's/\tIN/ 600 IN/;s/\t(//;s/\"$//;s/^\t  \"//g; s/ ).*//' """
+                f"""/etc/dkimkeys/{dkim_selector}.txt | tr --delete '\n'"""
+            ]
+        )
+        logger.info(f"Add this TXT entry into DNS zone: {result.stdout}")
+
+    python.call(name="Print TXT entry for DKIM", function=callback)

deploy-chatmail/src/deploy_chatmail/acmetool/__init__.py

@@ -1,6 +1,6 @@
 import importlib.resources
 
-from pyinfra.operations import apt, files, server
+from pyinfra.operations import apt, files, systemd, server
 
 
 def deploy_acmetool(nginx_hook=False, email="", domains=[]):

deploy-chatmail/src/deploy_chatmail/deploy.py

@@ -6,7 +6,7 @@ from deploy_chatmail import deploy_chatmail
 def main():
     mail_domain = os.getenv("CHATMAIL_DOMAIN")
     mail_server = os.getenv("CHATMAIL_SERVER", mail_domain)
-    dkim_selector = os.getenv("CHATMAIL_DKIM_SELECTOR", "dkim")
+    dkim_selector = os.getenv("CHATMAIL_DKIM_SELECTOR", "2023")
 
     assert mail_domain
     assert mail_server

deploy-chatmail/src/deploy_chatmail/dovecot/dovecot.conf.j2

@@ -118,24 +118,6 @@ service auth-worker {
   user = vmail
 }
 
-service imap-login {
-    # High-security mode.
-    # Each process serves a single connection and exits afterwards.
-    # This is the default, but we set it explicitly to be sure.
-    # See <https://doc.dovecot.org/admin_manual/login_processes/#high-security-mode> for details.
-    service_count = 1
-
-    # Inrease the number of simultaneous connections.
-    #
-    # As of Dovecot 2.3.19.1 the default is 100 processes.
-    # Combined with `service_count = 1` it means only 100 connections
-    # can be handled simultaneously.
-    process_limit = 10000
-
-    # Avoid startup latency for new connections.
-    process_min_avail = 10
-}
-
 ssl = required
 ssl_cert = </var/lib/acme/live/{{ config.hostname }}/fullchain
 ssl_key = </var/lib/acme/live/{{ config.hostname }}/privkey

deploy-chatmail/src/deploy_chatmail/journald.conf

@@ -1,2 +0,0 @@
-[Journal]
-MaxRetentionSec=3d

deploy-chatmail/src/deploy_chatmail/opendkim/KeyTable

@@ -1 +0,0 @@
-dkim._domainkey.{{ config.domain_name }} {{ config.domain_name }}:{{ config.opendkim_selector }}:/etc/dkimkeys/dkim.private

deploy-chatmail/src/deploy_chatmail/opendkim/SigningTable

@@ -1 +0,0 @@
-*@{{ config.domain_name }} {{ config.opendkim_selector }}._domainkey.{{ config.domain_name }}

deploy-chatmail/src/deploy_chatmail/opendkim/opendkim.conf

@@ -1,4 +1,7 @@
-# OpenDKIM configuration.
+# This is a basic configuration for signing and verifying. It can easily be
+# adapted to suit a basic installation. See opendkim.conf(5) and
+# /usr/share/doc/opendkim/examples/opendkim.conf.sample for complete
+# documentation of available configuration parameters.
 
 Syslog			yes
 SyslogSuccess		yes
@@ -18,9 +21,7 @@ OversignHeaders		From
 # setup options can be found in /usr/share/doc/opendkim/README.opendkim.
 Domain			{{ config.domain_name }}
 Selector		{{ config.opendkim_selector }}
-KeyFile		  /etc/dkimkeys/{{ config.opendkim_selector }}.private
-KeyTable          /etc/dkimkeys/KeyTable
-SigningTable      /etc/dkimkeys/SigningTable
+KeyFile		/etc/dkimkeys/{{ config.opendkim_selector }}.private
 
 # 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

deploy-chatmail/src/deploy_chatmail/postfix/master.cf.j2

@@ -32,7 +32,7 @@ submission inet n       -       y       -       -       smtpd
   -o smtpd_recipient_restrictions=
   -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
   -o milter_macro_daemon_name=ORIGINATING
-  -o smtpd_proxy_filter=127.0.0.1:10080
+  -o content_filter=filter:unix:private/filtermail
 smtps     inet  n       -       y       -       -       smtpd
   -o syslog_name=postfix/smtps
   -o smtpd_tls_wrappermode=yes
@@ -47,7 +47,7 @@ smtps     inet  n       -       y       -       -       smtpd
   -o smtpd_recipient_restrictions=
   -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
   -o milter_macro_daemon_name=ORIGINATING
-  -o smtpd_proxy_filter=127.0.0.1:10080
+  -o content_filter=filter:unix:private/filtermail
 #628       inet  n       -       y       -       -       qmqpd
 pickup    unix  n       -       y       60      1       pickup
 cleanup   unix  n       -       y       -       0       cleanup
@@ -76,5 +76,5 @@ scache    unix  -       -       y       -       1       scache
 postlog   unix-dgram n  -       n       -       1       postlogd
 filter    unix -        n       n       -       -       lmtp
 # Local SMTP server for reinjecting filered mail.
-localhost:10025 inet  n       -       n       -       10      smtpd
-  -o syslog_name=postfix/reinject
+localhost:10026 inet  n       -       n       -       10      smtpd
+        -o content_filter=

online-tests/benchmark.py

@@ -45,7 +45,7 @@ class TestDC:
             msg.chat.send_text("pong")
             ac1.wait_next_incoming_message()
 
-        benchmark(ping_pong, 5)
+        benchmark(ping_pong, 3)
 
     def test_send_10_receive_10(self, benchmark, cmfactory, lp):
         ac1, ac2 = cmfactory.get_online_accounts(2)
@@ -57,4 +57,4 @@ class TestDC:
             for i in range(10):
                 ac2.wait_next_incoming_message()
 
-        benchmark(send_10_receive_10, 5)
+        benchmark(send_10_receive_10, 1)

online-tests/conftest.py

@@ -6,16 +6,9 @@ import subprocess
 import imaplib
 import smtplib
 import itertools
-from email.parser import BytesParser
-from email import policy
-from pathlib import Path
-from math import ceil
 import pytest
 
 
-conftestdir = Path(__file__).parent
-
-
 def pytest_addoption(parser):
     parser.addoption(
         "--slow", action="store_true", default=False, help="also run slow tests"
@@ -24,9 +17,6 @@ def pytest_addoption(parser):
 
 def pytest_configure(config):
     config._benchresults = {}
-    config.addinivalue_line(
-        "markers", "slow: mark test to require --slow option to run"
-    )
 
 
 def pytest_runtest_setup(item):
@@ -88,28 +78,14 @@ def benchmark(request):
 def pytest_terminal_summary(terminalreporter):
     tr = terminalreporter
     results = tr.config._benchresults
-    if not results:
-        return
-
     tr.section("benchmark results")
-    float_names = "median min max".split()
-    width = max(map(len, float_names))
-
-    def fcol(parts):
-        return " ".join(part.rjust(width) for part in parts)
-
-    headers = f"{'benchmark name': <30} " + fcol(float_names)
+    headers = f"{'benchmark name': <30} {'median': >6}"
     tr.write_line(headers)
     tr.write_line("-" * len(headers))
     for name, durations in results.items():
-        measures = [
-            sorted(durations)[len(durations) // 2],
-            min(durations),
-            max(durations),
-        ]
-        line = f"{name: <30} "
-        line += fcol(f"{float: 2.2f}" for float in measures)
-        tr.write_line(line)
+        median = sorted(durations)[len(durations) // 2]
+        median = f"{median:2.4f}"
+        tr.write_line(f"{name: <30} {median: >6}")
 
 
 @pytest.fixture
@@ -195,8 +171,8 @@ def gencreds(maildomain):
             num = next(count)
             alphanumeric = "abcdefghijklmnopqrstuvwxyz1234567890"
             user = "".join(random.choices(alphanumeric, k=10))
-            user = f"ac{num}_{user}"[:9]
-            password = "".join(random.choices(alphanumeric, k=12))
+            user = f"ac{num}_{user}"
+            password = "".join(random.choices(alphanumeric, k=10))
             yield f"{user}@{domain}", f"{password}"
 
     return lambda domain=None: next(gen(domain))
@@ -287,19 +263,13 @@ class Remote:
 
 
 @pytest.fixture
-def maildata(request, gencreds):
-    datadir = conftestdir.joinpath("mail-data")
+def mailgen(request):
+    class Mailgen:
+        def get_encrypted(self, from_addr, to_addr):
+            data = request.fspath.dirpath("mailgen/encrypted.eml").read()
+            return data.format(from_addr=from_addr, to_addr=to_addr)
 
-    def maildata(name, from_addr=None, to_addr=None):
-        if from_addr is None:
-            from_addr = gencreds()[0]
-        if to_addr is None:
-            to_addr = gencreds()[0]
-        data = datadir.joinpath(name).read_text()
-        text = data.format(from_addr=from_addr, to_addr=to_addr)
-        return BytesParser(policy=policy.default).parsebytes(text.encode())
-
-    return maildata
+    return Mailgen()
 
 
 @pytest.fixture

online-tests/pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+addopts = -vrsx --strict-markers
+markers = slow: mark test as slow (requires --slow option to run)

online-tests/test_0_basic.py

@@ -20,7 +20,7 @@ def test_use_two_chatmailservers(cmfactory, maildomain2):
 
 
 @pytest.mark.parametrize("forgeaddr", ["internal", "someone@example.org"])
-def test_reject_forged_from(cmsetup, maildata, lp, forgeaddr):
+def test_reject_forged_from(cmsetup, mailgen, lp, remote, forgeaddr):
     user1, user3 = cmsetup.gen_users(2)
 
     lp.sec("send encrypted message with forged from")
@@ -31,33 +31,22 @@ def test_reject_forged_from(cmsetup, maildata, lp, forgeaddr):
         addr_to_forge = "someone@example.org"
 
     print("message to inject:")
-    msg = maildata("encrypted.eml", from_addr=addr_to_forge, to_addr=user3.addr)
-    msg = msg.as_string()
+    msg = mailgen.get_encrypted(from_addr=addr_to_forge, to_addr=user3.addr)
     for line in msg.split("\n")[:4]:
         print(f"   {line}")
 
     lp.sec("Send forged mail and check remote postfix lmtp processing result")
-    with pytest.raises(smtplib.SMTPException) as e:
-        user1.smtp.sendmail(from_addr=user1.addr, to_addrs=[user3.addr], msg=msg)
-    assert "500" in str(e.value)
+    remote_log = remote.iter_output("journalctl -t postfix/lmtp")
+    user1.smtp.sendmail(from_addr=user1.addr, to_addrs=[user3.addr], msg=msg)
+    for line in remote_log:
+        # print(line)
+        if "500 invalid from" in line and user3.addr in line:
+            break
+    else:
+        pytest.fail("remote postfix/filtermail failed to reject message")
 
-
-@pytest.mark.slow
-def test_exceed_rate_limit(cmsetup, gencreds, maildata):
-    """Test that the per-account send-mail limit is exceeded."""
-    user1, user2 = cmsetup.gen_users(2)
-    mail = maildata(
-        "encrypted.eml", from_addr=user1.addr, to_addr=user2.addr
-    ).as_string()
-    for i in range(100):
-        print("Sending mail", str(i))
-        try:
-            user1.smtp.sendmail(user1.addr, [user2.addr], mail)
-        except smtplib.SMTPException as e:
-            if i < 80:
-                pytest.fail(f"rate limit was exceeded too early with msg {i}")
-            outcome = e.recipients[user2.addr]
-            assert outcome[0] == 450
-            assert b"4.7.1: Too much mail from" in outcome[1]
+    # check that the logged in user (who sent the forged msg) got a non-delivery notice
+    for message in user1.imap.fetch_all_messages():
+        if "Invalid FROM" in message and addr_to_forge in message:
             return
-    pytest.fail("Rate limit was not exceeded")
+    pytest.fail(f"forged From={addr_to_forge} did not cause non-delivery notice")

online-tests/test_0_login.py

@@ -1,5 +1,4 @@
 import pytest
-import smtplib
 
 
 def test_login_basic_functioning(imap_or_smtp, gencreds, lp):
@@ -23,11 +22,6 @@ def test_login_basic_functioning(imap_or_smtp, gencreds, lp):
     with pytest.raises(imap_or_smtp.AuthError):
         imap_or_smtp.login(user, password + "wrong")
 
-    lp.sec(f"creating users with a short password is not allowed")
-    user, _password = gencreds()
-    with pytest.raises(imap_or_smtp.AuthError):
-        imap_or_smtp.login(user, "admin")
-
 
 def test_login_same_password(imap_or_smtp, gencreds):
     """Test two different users logging in with the same password

online-tests/test_1_deltachat.py

@@ -1,4 +1,3 @@
-import time
 import random
 import pytest
 
@@ -82,29 +81,3 @@ class TestEndToEndDeltaChat:
         ch = ac2.qr_setup_contact(qr)
         assert ch.id >= 10
         ac1._evtracker.wait_securejoin_inviter_progress(1000)
-
-    def test_read_receipts_between_instances(self, cmfactory, lp, maildomain2):
-        ac1 = cmfactory.new_online_configuring_account(cache=False)
-        cmfactory.switch_maildomain(maildomain2)
-        ac2 = cmfactory.new_online_configuring_account(cache=False)
-        cmfactory.bring_accounts_online()
-
-        lp.sec("setup encrypted comms between ac1 and ac2 on different instances")
-        qr = ac1.get_setup_contact_qr()
-        ch = ac2.qr_setup_contact(qr)
-        msg = ac2.wait_next_incoming_message()
-        assert "verified" in msg.text
-
-        lp.sec("ac1 sends a message and ac2 marks it as seen")
-        chat = ac1.create_chat(ac2)
-        msg = chat.send_text("hi")
-        m = ac2.wait_next_incoming_message()
-        m.mark_seen()
-        # we can only indirectly wait for mark-seen to cause an smtp-error
-        lp.sec("try to wait for markseen to complete and check error states")
-        deadline = time.time() + 3.1
-        while time.time() < deadline:
-            msgs = m.chat.get_messages()
-            for msg in msgs:
-                assert "error" not in m.get_message_info()
-            time.sleep(1)

scripts/bench.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 set -e
 
-venv/bin/pytest online-tests/benchmark.py -vrx 
+online-tests/venv/bin/pytest online-tests/benchmark.py -vrx 

scripts/deploy.sh

@@ -1,15 +1,10 @@
 #!/usr/bin/env bash
+: ${CHATMAIL_DOMAIN:=c1.testrun.org}
+export CHATMAIL_DOMAIN
 
-echo -----------------------------------------
-echo deploying to $CHATMAIL_DOMAIN 
-echo -----------------------------------------
+chatmaild/venv/bin/python3 -m build -n --sdist chatmaild --outdir dist
 
-echo WARNING: in five seconds deploy to $CHATMAIL_DOMAIN starts
-sleep 5
-
-venv/bin/python3 -m build -n --sdist chatmaild --outdir dist
-
-venv/bin/pyinfra --ssh-user root "$CHATMAIL_DOMAIN" \
+deploy-chatmail/venv/bin/pyinfra --ssh-user root "$CHATMAIL_DOMAIN" \
     deploy-chatmail/src/deploy_chatmail/deploy.py
 
 rm -r dist/

scripts/generate-dns-zone.sh

@@ -1,20 +0,0 @@
-#!/bin/sh
-: ${CHATMAIL_DOMAIN:=c1.testrun.org}
-: ${CHATMAIL_SSH:=$CHATMAIL_DOMAIN}
-
-set -e
-SSH="ssh root@$CHATMAIL_SSH"
-EMAIL="root@$CHATMAIL_DOMAIN"
-ACME_ACCOUNT_URL="$($SSH -- acmetool account-url)"
-
-cat <<EOF
-$CHATMAIL_DOMAIN. MX 10 $CHATMAIL_DOMAIN.
-$CHATMAIL_DOMAIN. TXT "v=spf1 a:$CHATMAIL_DOMAIN -all"
-_dmarc.$CHATMAIL_DOMAIN. TXT "v=DMARC1;p=reject;rua=mailto:$EMAIL;ruf=mailto:$EMAIL;fo=1;adkim=r;aspf=r"
-_submission._tcp.$CHATMAIL_DOMAIN.  SRV 0 1 587 $CHATMAIL_DOMAIN.
-_submissions._tcp.$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. IN CAA 0 issue "letsencrypt.org; accounturi=$ACME_ACCOUNT_URL"
-EOF
-$SSH opendkim-genzone -F | sed 's/^;.*$//;/^$/d'

scripts/init.sh

@@ -1,8 +1,14 @@
 #!/bin/sh
 set -e
-python3 -m venv venv
-pip=venv/bin/pip
+python3 -m venv deploy-chatmail/venv
+deploy-chatmail/venv/bin/pip install pyinfra pytest
+deploy-chatmail/venv/bin/pip install -e deploy-chatmail
+deploy-chatmail/venv/bin/pip install -e chatmaild
 
-$pip install pyinfra pytest build 'setuptools>=68' tox deltachat
-$pip install -e deploy-chatmail 
-$pip install -e chatmaild 
+python3 -m venv chatmaild/venv
+sudo apt install -y dovecot-core && sudo systemctl disable --now dovecot
+chatmaild/venv/bin/pip install --upgrade pytest build 'setuptools>=68'
+chatmaild/venv/bin/pip install -e chatmaild
+
+python3 -m venv online-tests/venv
+online-tests/venv/bin/pip install pytest pytest-timeout pdbpp deltachat 

scripts/test.sh

@@ -1,4 +1,3 @@
 #!/bin/bash
-venv/bin/tox -c chatmaild
-venv/bin/tox -c deploy-chatmail
-venv/bin/pytest tests/online -vrx --durations=5 $@
+chatmaild/venv/bin/pytest chatmaild/ $@
+online-tests/venv/bin/pytest online-tests/ -vrx --durations=5 $@

tests/chatmaild/test_dictproxy.py

@@ -1,64 +0,0 @@
-import os
-import json
-
-import pytest
-
-import chatmaild.dictproxy
-from chatmaild.dictproxy import get_user_data, lookup_passdb, handle_dovecot_request
-from chatmaild.database import Database, DBError
-
-
-@pytest.fixture()
-def db(tmpdir):
-    db_path = tmpdir / "passdb.sqlite"
-    print("database path:", db_path)
-    return Database(db_path)
-
-
-
-def test_basic(db):
-    lookup_passdb(db, "link2xt@c1.testrun.org", "Pieg9aeToe3eghuthe5u")
-    data = get_user_data(db, "link2xt@c1.testrun.org")
-    assert data
-    data2 = lookup_passdb(db, "link2xt@c1.testrun.org", "Pieg9aeToe3eghuthe5u")
-    assert data == data2
-
-
-def test_dont_overwrite_password_on_wrong_login(db):
-    """Test that logging in with a different password doesn't create a new user"""
-    res = lookup_passdb(db, "newuser1@something.org", "kajdlkajsldk12l3kj1983")
-    assert res["password"]
-    res2 = lookup_passdb(db, "newuser1@something.org", "kajdlqweqwe")
-    # this function always returns a password hash, which is actually compared by dovecot.
-    assert res["password"] == res2["password"]
-
-
-def test_nocreate_file(db, monkeypatch, tmpdir):
-    p = tmpdir.join("nocreate")
-    p.write("")
-    monkeypatch.setattr(chatmaild.dictproxy, "NOCREATE_FILE", str(p))
-    lookup_passdb(db, "newuser1@something.org", "zequ0Aimuchoodaechik")
-    assert not get_user_data(db, "newuser1@something.org")
-
-
-def test_db_version(db):
-    assert db.get_schema_version() == 1
-
-
-def test_too_high_db_version(db):
-    with db.write_transaction() as conn:
-        conn.execute("PRAGMA user_version=%s;" % (999,))
-    with pytest.raises(DBError):
-        db.ensure_tables()
-
-
-def test_handle_dovecot_request(db):
-    msg = ('Lshared/passdb/laksjdlaksjdlaksjdlk12j3l1k2j3123/'
-           'some42@c3.testrun.org\tsome42@c3.testrun.org')
-    res = handle_dovecot_request(msg, db, "c3.testrun.org")
-    assert res
-    assert res[0] == "O" and res.endswith("\n")
-    userdata = json.loads(res[1:].strip())
-    assert userdata["home"] == "/home/vmail/some42@c3.testrun.org"
-    assert userdata["uid"] == userdata["gid"] == "vmail"
-    assert userdata["password"].startswith("{SHA512-CRYPT}")

tests/chatmaild/test_filtermail.py

@@ -1,82 +0,0 @@
-from chatmaild.filtermail import check_encrypted, check_DATA, SendRateLimiter, check_mdn
-import pytest
-
-
-@pytest.fixture
-def maildomain():
-    # let's not depend on a real chatmail instance for the offline tests below
-    return "chatmail.example.org"
-
-
-def test_reject_forged_from(maildata, gencreds):
-    class env:
-        mail_from = gencreds()[0]
-        rcpt_tos = [gencreds()[0]]
-
-    # test that the filter lets good mail through
-    env.content = maildata("plain.eml", from_addr=env.mail_from).as_bytes()
-    assert not check_DATA(envelope=env)
-
-    # test that the filter rejects forged mail
-    env.content = maildata("plain.eml", from_addr="forged@c3.testrun.org").as_bytes()
-    error = check_DATA(envelope=env)
-    assert "500" in error
-
-
-def test_filtermail_no_encryption_detection(maildata):
-    msg = maildata("plain.eml")
-    assert not check_encrypted(msg)
-
-    # https://xkcd.com/1181/
-    msg = maildata("fake-encrypted.eml")
-    assert not check_encrypted(msg)
-
-
-def test_filtermail_encryption_detection(maildata):
-    msg = maildata("encrypted.eml")
-    assert check_encrypted(msg)
-
-    # if the subject is not "..." it is not considered ac-encrypted
-    msg.replace_header("Subject", "Click this link")
-    assert not check_encrypted(msg)
-
-
-def test_filtermail_is_mdn(maildata, gencreds):
-    from_addr = gencreds()[0]
-    to_addr = gencreds()[0] + ".other"
-    msg = maildata("mdn.eml", from_addr, to_addr)
-
-    class env:
-        mail_from = from_addr
-        rcpt_tos = [to_addr]
-        content = msg.as_bytes()
-
-    assert check_mdn(msg, env)
-    print(msg.as_string())
-    assert not check_DATA(env)
-
-
-def test_filtermail_to_multiple_recipients_no_mdn(maildata, gencreds):
-    from_addr = gencreds()[0]
-    to_addr = gencreds()[0] + ".other"
-    thirdaddr = gencreds()[0]
-    msg = maildata("mdn.eml", from_addr, to_addr)
-
-    class env:
-        mail_from = from_addr
-        rcpt_tos = [to_addr, thirdaddr]
-        content = msg.as_bytes()
-
-    assert not check_mdn(msg, env)
-
-
-def test_send_rate_limiter():
-    limiter = SendRateLimiter()
-    for i in range(100):
-        if limiter.is_sending_allowed("some@example.org"):
-            if i <= SendRateLimiter.MAX_USER_SEND_PER_MINUTE:
-                continue
-            pytest.fail("limiter didn't work")
-        else:
-            assert i == SendRateLimiter.MAX_USER_SEND_PER_MINUTE + 1
-            break

tests/mail-data/fake-encrypted.eml

@@ -1,25 +0,0 @@
-Subject: =?utf-8?q?Message_from_foobar=40c2=2Etestrun=2Eorg?=
-Chat-Disposition-Notification-To: foobar@c2.testrun.org
-Chat-User-Avatar: 0
-From: <{from_addr}>
-To: <{to_addr}>
-Date: Sun, 15 Oct 2023 16:41:44 +0000
-Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>
-References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>
-Chat-Version: 1.0
-Autocrypt: addr={from_addr}; prefer-encrypt=mutual;
-	keydata=xjMEZSrw3hYJKwYBBAHaRw8BAQdAiEKNQFU28c6qsx4vo/JHdt73RXdjMOmByf/XsGiJ7m
-	nNFzxmb29iYXJAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUq8N4CGwMECwkIBwYVCAkKCwID
-	FgIBFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJCX3gEAhm0MehE5byBBU1avPczr/I
-	HjNLht7Qf6++mAhlJmtDcA/0C8VYJhsUpmiDjuZaMDWNv4FO2BJG6LH7gSm6n7ClMJzjgEZSrw3hIK
-	KwYBBAGXVQEFAQEHQAxGG/QW0owCfMp1A+vXEMwgzWcBpNFr58kX2eXuPpM6AwEIB8J4BBgWCAAgBQ
-	JlKvDeAhsMFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJDg1gEAwLf8KDoAAKyYgjyI
-	vYvO9VEgBni1C4Xx1VjcaEmlDK8BALoFuUCK+enw76TtDcAUKhlhUiM6SDRExkS4Nskp/BcK
-MIME-Version: 1.0
-Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no
-
------BEGIN PGP MESSAGE-----
-Hi!
------END PGP MESSAGE-----
-
-

tests/mail-data/mdn.eml

@@ -1,33 +0,0 @@
-Subject: Message opened
-From: <{from_addr}>
-To: <{to_addr}>
-Date: Sun, 15 Oct 2023 16:43:25 +0000
-Message-ID: <Mr.78MWtlV7RAi.goCFzBhCYfy@c2.testrun.org>
-Auto-Submitted: auto-replied
-Chat-Version: 1.0
-MIME-Version: 1.0
-Content-Type: multipart/report; report-type=disposition-notification;
-	boundary="Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi"
-
-
---Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi
-Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no
-
-The "Hi!" message you sent was displayed on the screen of the recipient.
-
-This is no guarantee the content was read.
-
-
---Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi
-Content-Type: message/disposition-notification
-
-Reporting-UA: Delta Chat 1.124.1
-Original-Recipient: rfc822;barbaz@c2.testrun.org
-Final-Recipient: rfc822;barbaz@c2.testrun.org
-Original-Message-ID: <Mr.MvmCz-GQbi_.6FGRkhDf05c@c2.testrun.org>
-Disposition: manual-action/MDN-sent-automatically; displayed
-
-
---Gl92xgZjOShJ5PGHntqYkoo2OK2Dvi--
-
-

tests/mail-data/plain.eml

@@ -1,23 +0,0 @@
-Subject: =?utf-8?q?Message_from_foobar=40c2=2Etestrun=2Eorg?=
-Chat-Disposition-Notification-To: foobar@c2.testrun.org
-Chat-User-Avatar: 0
-From: <{from_addr}>
-To: <{to_addr}>
-Date: Sun, 15 Oct 2023 16:41:44 +0000
-Message-ID: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>
-References: <Mr.3gckbNy5bch.uK3Hd2Ws6-w@c2.testrun.org>
-Chat-Version: 1.0
-Autocrypt: addr=foobar@c2.testrun.org; prefer-encrypt=mutual;
-	keydata=xjMEZSrw3hYJKwYBBAHaRw8BAQdAiEKNQFU28c6qsx4vo/JHdt73RXdjMOmByf/XsGiJ7m
-	nNFzxmb29iYXJAYzIudGVzdHJ1bi5vcmc+wosEEBYIADMCGQEFAmUq8N4CGwMECwkIBwYVCAkKCwID
-	FgIBFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJCX3gEAhm0MehE5byBBU1avPczr/I
-	HjNLht7Qf6++mAhlJmtDcA/0C8VYJhsUpmiDjuZaMDWNv4FO2BJG6LH7gSm6n7ClMJzjgEZSrw3hIK
-	KwYBBAGXVQEFAQEHQAxGG/QW0owCfMp1A+vXEMwgzWcBpNFr58kX2eXuPpM6AwEIB8J4BBgWCAAgBQ
-	JlKvDeAhsMFiEEGil0OvTIa6RngmCLUYNnEa9leJAACgkQUYNnEa9leJDg1gEAwLf8KDoAAKyYgjyI
-	vYvO9VEgBni1C4Xx1VjcaEmlDK8BALoFuUCK+enw76TtDcAUKhlhUiM6SDRExkS4Nskp/BcK
-MIME-Version: 1.0
-Content-Type: text/plain; charset=utf-8; format=flowed; delsp=no
-
-Hi!
-
-

tests/pytest.ini

@@ -1,2 +0,0 @@
-[pytest]
-addopts = -vrsx --strict-markers

www/nine.testrun.org/index.html

@@ -1,61 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <meta charset="utf-8" />
-    <title>nine.testrun.org - Experimenting with the Future of Email</title>
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <style>
-        .wrapper {
-            width: 100%;
-            max-width: 596px;
-            margin: 0 auto;
-        }
-
-        .section {
-            width: 100%;
-            max-width: 596px;
-        }
-
-        .text {
-            box-sizing: border-box;
-            padding: 9px;
-            font-size: 18px;
-            font-family: "Courier New", monospace;
-            color: white;
-            background-position: left top;
-            background-image: url(collage-bg.png);
-            background-repeat: no-repeat;
-            background-size: 100% 100%;
-        }
-        h1, h2, h3 {
-            font-size: 16px;
-            font-weight: bold;
-        }
-    </style>
-</head>
-<body>
-    <div class="wrapper">
-        <img class="section" src="collage-top.png" />
-        <div class="section text">
-            <h1>welcome  to nine.testrun.org</h1>
-            <p>
-                to get an account,
-                invent a word with <i>exactly</i> nine characters
-                and append @nine.testrun.org to it.
-                eg. <b>hellofits@nine.testrun.org</b>
-            </p>
-            <p>
-                if the email address is not yet taken, you'll get that account.
-                the first login sets your password.
-                that's it.
-            </p>
-        </div>
-        <img class="section" src="collage-down.png" />
-        <div class="section text">
-            <h1>faq</h1>
-            <p><i>why are other email providers 1000 times more complicated?</i></p>
-            <p>because they want to for $reasons</p>
-        </div>
-    </div>
-</body>
-</html>