Merge branch 'master' of https://github.com/Mailu/Mailu into tls_policy_map

core/admin/mailu/configuration.py

@@ -32,6 +32,7 @@ DEFAULT_CONFIG = {
     'DOMAIN': 'mailu.io',
     'HOSTNAMES': 'mail.mailu.io,alternative.mailu.io,yetanother.mailu.io',
     'POSTMASTER': 'postmaster',
+    'WILDCARD_SENDERS': '',
     'TLS_FLAVOR': 'cert',
     'INBOUND_TLS_ENFORCE': False,
     'AUTH_RATELIMIT': '1000/minute;10000/hour',
@@ -46,6 +47,7 @@ DEFAULT_CONFIG = {
     'DKIM_SELECTOR': 'dkim',
     'DKIM_PATH': '/dkim/{domain}.{selector}.key',
     'DEFAULT_QUOTA': 1000000000,
+    'MESSAGE_RATELIMIT': '200/day',
     # Web settings
     'SITENAME': 'Mailu',
     'WEBSITE': 'https://mailu.io',

core/admin/mailu/internal/nginx.py

@@ -81,6 +81,13 @@ def handle_authentication(headers):
         raw_password = urllib.parse.unquote(headers["Auth-Pass"])
         password = raw_password.encode("iso8859-1").decode("utf8")
         ip = urllib.parse.unquote(headers["Client-Ip"])
+        service_port = int(urllib.parse.unquote(headers["Auth-Port"]))
+        if service_port == 25:
+            return {
+                "Auth-Status": "AUTH not supported",
+                "Auth-Error-Code": "502 5.5.1",
+                "Auth-Wait": 0
+            }
         user = models.User.query.get(user_email)
         if check_credentials(user, password, ip, protocol):
             return {

core/admin/mailu/internal/views/postfix.py

@@ -1,5 +1,6 @@
-from mailu import models
+from mailu import models, utils
 from mailu.internal import internal
+from flask import current_app as app
 
 import flask
 import idna
@@ -31,7 +32,6 @@ def postfix_alias_map(alias):
     destination = models.Email.resolve_destination(localpart, domain_name)
     return flask.jsonify(",".join(destination)) if destination else flask.abort(404)
 
-
 @internal.route("/postfix/transport/<path:email>")
 def postfix_transport(email):
     if email == '*' or re.match("(^|.*@)\[.*\]$", email):
@@ -133,12 +133,20 @@ def postfix_sender_map(sender):
 
 @internal.route("/postfix/sender/login/<path:sender>")
 def postfix_sender_login(sender):
+    wildcard_senders = [s for s in flask.current_app.config.get('WILDCARD_SENDERS', '').lower().replace(' ', '').split(',') if s]
     localpart, domain_name = models.Email.resolve_domain(sender)
     if localpart is None:
-        return flask.abort(404)
+        return flask.jsonify(",".join(wildcard_senders)) if wildcard_senders else flask.abort(404)
     destination = models.Email.resolve_destination(localpart, domain_name, True)
+    destination = [*destination, *wildcard_senders] if destination else [*wildcard_senders]
     return flask.jsonify(",".join(destination)) if destination else flask.abort(404)
 
+@internal.route("/postfix/sender/rate/<path:sender>")
+def postfix_sender_rate(sender):
+    """ Rate limit outbound emails per sender login
+    """
+    user = models.User.get(sender) or flask.abort(404)
+    return flask.abort(404) if user.sender_limiter.hit() else flask.jsonify("450 4.2.1 You are sending too many emails too fast.")
 
 @internal.route("/postfix/sender/access/<path:sender>")
 def postfix_sender_access(sender):

core/admin/mailu/models.py

@@ -27,7 +27,7 @@ from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.inspection import inspect
 from werkzeug.utils import cached_property
 
-from mailu import dkim
+from mailu import dkim, utils
 
 
 db = flask_sqlalchemy.SQLAlchemy()
@@ -501,6 +501,12 @@ class User(Base, Email):
             self.reply_enddate > now
         )
 
+    @property
+    def sender_limiter(self):
+        return utils.limiter.get_limiter(
+            app.config["MESSAGE_RATELIMIT"], "sender", self.email
+        )
+
     @classmethod
     def get_password_context(cls):
         """ create password context for hashing and verification

core/admin/mailu/ui/templates/user/list.html

@@ -19,7 +19,8 @@
   <th>{% trans %}User settings{% endtrans %}</th>
   <th>{% trans %}Email{% endtrans %}</th>
   <th>{% trans %}Features{% endtrans %}</th>
-  <th>{% trans %}Quota{% endtrans %}</th>
+  <th>{% trans %}Storage Quota{% endtrans %}</th>
+  <th>{% trans %}Sending Quota{% endtrans %}</th>
   <th>{% trans %}Comment{% endtrans %}</th>
   <th>{% trans %}Created{% endtrans %}</th>
   <th>{% trans %}Last edit{% endtrans %}</th>
@@ -41,6 +42,8 @@
     {% if user.enable_pop %}<span class="label label-info">pop3</span>{% endif %}
   </td>
   <td>{{ user.quota_bytes_used | filesizeformat }} / {{ (user.quota_bytes | filesizeformat) if user.quota_bytes else '∞' }}</td>
+  {% set limiter = user.sender_limiter %}
+  <td>{{ limiter.get_window_stats()[1] }} / {{ limiter.limit }}</td>
   <td>{{ user.comment or '-' }}</td>
   <td>{{ user.created_at }}</td>
   <td>{{ user.updated_at or '' }}</td>

core/nginx/conf/dhparam.pem

@@ -1,13 +1,11 @@
 -----BEGIN DH PARAMETERS-----
-MIICCAKCAgEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
-+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
-87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
-YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
-7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
-ssbzSibBsu/6iGtCOGEfz9zeNVs7ZRkDW7w09N75nAI4YbRvydbmyQd62R0mkff3
-7lmMsPrBhtkcrv4TCYUTknC0EwyTvEN5RPT9RFLi103TZPLiHnH1S/9croKrnJ32
-nuhtK8UiNjoNq8Uhl5sN6todv5pC1cRITgq80Gv6U93vPBsg7j/VnXwl5B0rZp4e
-8W5vUsMWTfT7eTDp5OWIV7asfV9C1p9tGHdjzx1VA0AEh/VbpX4xzHpxNciG77Qx
-iu1qHgEtnmgyqQdgCpGBMMRtx3j5ca0AOAkpmaMzy4t6Gh25PXFAADwqTs6p+Y0K
-zAqCkc3OyX3Pjsm1Wn+IpGtNtahR9EGC4caKAH5eZV9q//////////8CAQI=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 -----END DH PARAMETERS-----

core/nginx/conf/nginx.conf

@@ -250,6 +250,7 @@ mail {
       listen 10025;
       protocol smtp;
       smtp_auth plain;
+      auth_http_header Auth-Port 10025;
     }
 
     # Default IMAP server for the webmail (no encryption, but authentication)
@@ -257,6 +258,7 @@ mail {
       listen 10143;
       protocol imap;
       smtp_auth plain;
+      auth_http_header Auth-Port 10043;
     }
 
     # SMTP is always enabled, to avoid losing emails when TLS is failing
@@ -271,6 +273,7 @@ mail {
       {% endif %}
       protocol smtp;
       smtp_auth none;
+      auth_http_header Auth-Port 25;
     }
 
     # All other protocols are disabled if TLS is failing
@@ -283,6 +286,7 @@ mail {
       {% endif %}
       protocol imap;
       imap_auth plain;
+      auth_http_header Auth-Port 143;
     }
 
     server {
@@ -293,6 +297,7 @@ mail {
       {% endif %}
       protocol pop3;
       pop3_auth plain;
+      auth_http_header Auth-Port 110;
     }
 
     server {
@@ -303,6 +308,7 @@ mail {
       {% endif %}
       protocol smtp;
       smtp_auth plain login;
+      auth_http_header Auth-Port 587;
     }
 
     {% if TLS %}
@@ -311,6 +317,7 @@ mail {
       listen [::]:465 ssl;
       protocol smtp;
       smtp_auth plain login;
+      auth_http_header Auth-Port 465;
     }
 
     server {
@@ -318,6 +325,7 @@ mail {
       listen [::]:993 ssl;
       protocol imap;
       imap_auth plain;
+      auth_http_header Auth-Port 993;
     }
 
     server {
@@ -325,6 +333,7 @@ mail {
       listen [::]:995 ssl;
       protocol pop3;
       pop3_auth plain;
+      auth_http_header Auth-Port 995;
     }
     {% endif %}
     {% endif %}

core/nginx/conf/tls.conf

@@ -1,5 +1,10 @@
 ssl_certificate {{ TLS[0] }};
 ssl_certificate_key {{ TLS[1] }};
+{% if TLS_FLAVOR in ['letsencrypt','mail-letsencrypt'] %}
+ssl_certificate {{ TLS[2] }};
+ssl_certificate_key {{ TLS[3] }};
+ssl_trusted_certificate /etc/ssl/certs/ca-cert-DST_Root_CA_X3.pem;
+{% endif %}
 ssl_session_timeout 1d;
 ssl_session_tickets off;
 ssl_dhparam /conf/dhparam.pem;

core/nginx/config.py

@@ -26,11 +26,11 @@ cert_name = os.getenv("TLS_CERT_FILENAME", default="cert.pem")
 keypair_name = os.getenv("TLS_KEYPAIR_FILENAME", default="key.pem")
 args["TLS"] = {
     "cert": ("/certs/%s" % cert_name, "/certs/%s" % keypair_name),
-    "letsencrypt": ("/certs/letsencrypt/live/mailu/fullchain.pem",
-        "/certs/letsencrypt/live/mailu/privkey.pem"),
+    "letsencrypt": ("/certs/letsencrypt/live/mailu/nginx-chain.pem",
+        "/certs/letsencrypt/live/mailu/privkey.pem", "/certs/letsencrypt/live/mailu-ecdsa/nginx-chain.pem", "/certs/letsencrypt/live/mailu-ecdsa/privkey.pem"),
     "mail": ("/certs/%s" % cert_name, "/certs/%s" % keypair_name),
-    "mail-letsencrypt": ("/certs/letsencrypt/live/mailu/fullchain.pem",
-        "/certs/letsencrypt/live/mailu/privkey.pem"),
+    "mail-letsencrypt": ("/certs/letsencrypt/live/mailu/nginx-chain.pem",
+        "/certs/letsencrypt/live/mailu/privkey.pem", "/certs/letsencrypt/live/mailu-ecdsa/nginx-chain.pem", "/certs/letsencrypt/live/mailu-ecdsa/privkey.pem"),
     "notls": None
 }[args["TLS_FLAVOR"]]
 

core/nginx/letsencrypt.py

@@ -4,7 +4,6 @@ import os
 import time
 import subprocess
 
-
 command = [
     "certbot",
     "-n", "--agree-tos", # non-interactive
@@ -14,16 +13,45 @@ command = [
     "--cert-name", "mailu",
     "--preferred-challenges", "http", "--http-01-port", "8008",
     "--keep-until-expiring",
-    "--rsa-key-size", "4096",
+    "--config-dir", "/certs/letsencrypt",
+    "--post-hook", "/config.py"
+]
+command2 = [
+    "certbot",
+    "-n", "--agree-tos", # non-interactive
+    "-d", os.environ["HOSTNAMES"],
+    "-m", "{}@{}".format(os.environ["POSTMASTER"], os.environ["DOMAIN"]),
+    "certonly", "--standalone",
+    "--cert-name", "mailu-ecdsa",
+    "--preferred-challenges", "http", "--http-01-port", "8008",
+    "--keep-until-expiring",
+    "--key-type", "ecdsa",
     "--config-dir", "/certs/letsencrypt",
     "--post-hook", "/config.py"
 ]
 
+def format_for_nginx(fullchain, output):
+    """ We may want to strip ISRG Root X1 out
+    """
+    certs = []
+    with open(fullchain, 'r') as pem:
+        cert = ''
+        for line in pem:
+            cert += line
+            if '-----END CERTIFICATE-----' in line:
+                certs += [cert]
+                cert = ''
+    with open(output, 'w') as pem:
+        for cert in certs[:-1] if len(certs)>2 and os.getenv('LETSENCRYPT_SHORTCHAIN', default="False") else certs:
+            pem.write(cert)
+
 # Wait for nginx to start
 time.sleep(5)
 
-# Run certbot every hour
+# Run certbot every day
 while True:
     subprocess.call(command)
-    time.sleep(3600)
-
+    format_for_nginx('/certs/letsencrypt/live/mailu/fullchain.pem', '/certs/letsencrypt/live/mailu/nginx-chain.pem')
+    subprocess.call(command2)
+    format_for_nginx('/certs/letsencrypt/live/mailu-ecdsa/fullchain.pem', '/certs/letsencrypt/live/mailu-ecdsa/nginx-chain.pem')
+    time.sleep(86400)

core/postfix/conf/main.cf

@@ -33,7 +33,8 @@ relayhost = {{ RELAYHOST }}
 {% if RELAYUSER %}
 smtp_sasl_auth_enable = yes
 smtp_sasl_password_maps = lmdb:/etc/postfix/sasl_passwd
-smtp_sasl_security_options = noanonymous
+smtp_sasl_security_options = noanonymous, noplaintext
+smtp_sasl_tls_security_options = noanonymous
 {% endif %}
 
 # Recipient delimiter for extended addresses
@@ -57,10 +58,11 @@ tls_ssl_options = NO_COMPRESSION, NO_TICKET
 # 2. not all will have and up-to-date TLS stack.
 smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
 smtp_tls_protocols =!SSLv2,!SSLv3
-smtp_tls_session_cache_database = lmdb:${data_directory}/smtp_scache
 smtp_tls_security_level = {{ OUTBOUND_TLS_LEVEL|default('may') }}
 smtp_tls_policy_maps=hash:/etc/postfix/tls_policy.map
 smtp_tls_CApath = /etc/ssl/certs
+smtp_tls_session_cache_database = lmdb:/dev/shm/postfix/smtp_scache
+smtpd_tls_session_cache_database = lmdb:/dev/shm/postfix/smtpd_scache
 
 ###############
 # Virtual
@@ -101,6 +103,8 @@ smtpd_sender_login_maps = ${podop}senderlogin
 # Restrictions for incoming SMTP, other restrictions are applied in master.cf
 smtpd_helo_required = yes
 
+check_ratelimit = check_sasl_access ${podop}senderrate
+
 smtpd_client_restrictions =
   permit_mynetworks,
   check_sender_access ${podop}senderaccess,

core/postfix/conf/master.cf

@@ -7,7 +7,8 @@ smtp      inet  n       -       n       -       -       smtpd
 # Internal SMTP service
 10025     inet  n       -       n       -       -       smtpd
   -o smtpd_sasl_auth_enable=yes
-  -o smtpd_client_restrictions=reject_unlisted_sender,reject_authenticated_sender_login_mismatch,permit
+  -o smtpd_discard_ehlo_keywords=pipelining
+  -o smtpd_client_restrictions=$check_ratelimit,reject_unlisted_sender,reject_authenticated_sender_login_mismatch,permit
   -o smtpd_reject_unlisted_recipient={% if REJECT_UNLISTED_RECIPIENT %}{{ REJECT_UNLISTED_RECIPIENT }}{% else %}no{% endif %}
   -o cleanup_service_name=outclean
 outclean  unix n       -       n       -       0       cleanup

core/postfix/start.py

@@ -15,6 +15,7 @@ log.basicConfig(stream=sys.stderr, level=os.environ.get("LOG_LEVEL", "WARNING"))
 
 def start_podop():
     os.setuid(getpwnam('postfix').pw_uid)
+    os.mkdir('/dev/shm/postfix',mode=0o700)
     url = "http://" + os.environ["ADMIN_ADDRESS"] + "/internal/postfix/"
     # TODO: Remove verbosity setting from Podop?
     run_server(0, "postfix", "/tmp/podop.socket", [
@@ -25,7 +26,8 @@ def start_podop():
         ("recipientmap", "url", url + "recipient/map/§"),
         ("sendermap", "url", url + "sender/map/§"),
         ("senderaccess", "url", url + "sender/access/§"),
-        ("senderlogin", "url", url + "sender/login/§")
+        ("senderlogin", "url", url + "sender/login/§"),
+        ("senderrate", "url", url + "sender/rate/§")
     ])
 
 def is_valid_postconf_line(line):

docs/configuration.rst

@@ -37,6 +37,8 @@ The ``POSTMASTER`` is the local part of the postmaster email address. It is
 recommended to setup a generic value and later configure a mail alias for that
 address.
 
+The ``WILDCARD_SENDERS`` setting is a comma delimited list of user email addresses that are allowed to send emails from any existing address (spoofing the sender).
+
 The ``AUTH_RATELIMIT`` holds a security setting for fighting attackers that
 try to guess user passwords. The value is the limit of failed authentication attempts
 that a single IP address can perform against IMAP, POP and SMTP authentication endpoints.
@@ -163,6 +165,11 @@ See the `python docs`_ for more information.
 
 .. _`python docs`: https://docs.python.org/3.6/library/logging.html#logging-levels
 
+The ``LETSENCRYPT_SHORTCHAIN`` (default: False) setting controls whether we send the ISRG Root X1 certificate in TLS handshakes. This is required for `android handsets older than 7.1.1` but slows down the performance of modern devices.
+
+.. _`android handsets older than 7.1.1`: https://community.letsencrypt.org/t/production-chain-changes/150739
+
+
 Antivirus settings
 ------------------
 

docs/webadministration.rst

@@ -315,6 +315,21 @@ This page is also accessible for domain managers. On the users page new users ca
 
 * Fetched accounts. Access the fetched accounts page of the user. See the :ref:`fetched accounts page <webadministration_fetched_accounts>` for more information.
 
+This page also shows an overview of the following settings of an user:
+
+* Email. The email address of the user.
+
+* Features. Shows if IMAP or POP3 access is enabled.
+
+* Storage quota. Shows how much assigned storage has been consumed.
+
+* Sending Quota. The sending quota is the limit of messages a single user can send per day. 
+
+* Comment. A desription for the user. 
+
+* Created. Date when the user was created.
+
+* Last edit. Last date when the user was modified. 
 
 .. _webadministration_add_user:
 
@@ -334,7 +349,7 @@ For adding a new user the following options can be configured.
 * Enabled. Tick this checkbox to enable the user account. When an user is disabled, the user is unable to login to the Admin GUI or webmail or access his email via IMAP/POP3 or send mail.
   The email inbox of the user is still retained. This option can be used to temporarily suspend an user account.
 
-* Quota. The maximum quota for the user's email box.
+* Storage Quota. The maximum quota for the user's email box.
 
 * Allow IMAP access. When ticked, allows email retrieval via the IMAP protocol.
 

optional/unbound/Dockerfile

@@ -1,4 +1,4 @@
-ARG DISTRO=alpine:3.14
+ARG DISTRO=alpine:3.12
 FROM $DISTRO
 # python3 shared with most images
 RUN apk add --no-cache \

setup/flavors/compose/mailu.env

@@ -62,6 +62,11 @@ ANTIVIRUS={{ antivirus_enabled or 'none' }}
 # Max attachment size will be 33% smaller
 MESSAGE_SIZE_LIMIT={{ message_size_limit or '50000000' }}
 
+# Message rate limit (per user)
+{% if message_ratelimit_pd > '0' %}
+MESSAGE_RATELIMIT={{ message_ratelimit_pd }}/day
+{% endif %}
+
 # Networks granted relay permissions
 # Use this with care, all hosts in this networks will be able to send mail without authentication!
 RELAYNETS=

setup/templates/steps/config.html

@@ -55,6 +55,13 @@ Or in plain english: if receivers start to classify your mail as spam, this post
   </p>
 </div>
 
+<div class="form-group">
+  <label>Outgoing message rate limit (per user)</label>
+  <!--   Validates number input only -->
+  <p><input class="form-control" style="width: 7%; display: inline;" type="number" name="message_ratelimit_pd" value="200" required > / day
+  </p>
+</div>
+
 <div class="form-check form-check-inline">
   <label class="form-check-label">
     <input class="form-check-input" type="checkbox" name="disable_statistics" value="True">

towncrier/newsfragments/1031.feature

@@ -0,0 +1 @@
+Add sending quotas per user

towncrier/newsfragments/1096.feature

@@ -0,0 +1 @@
+Allow specific users to send emails from any address using the WILDCARD_SENDERS setting

towncrier/newsfragments/1922.enhancement

@@ -0,0 +1,5 @@
+Add support for ECDSA certificates when letsencrypt is used. This means dropping compatibility for android < 4.1.1
+Add LETSENCRYPT_SHORTCHAIN to your configuration to avoid sending ISRG Root X1 (this will break compatibility with android < 7.1.1)
+Disable AUTH command on port 25
+Disable TLS tickets, reconfigure the cache to improve Forward Secrecy
+Prevent clear-text credentials from being sent to relays