Added documentation.

doc/manual_installation/modoboa.rst

@@ -204,5 +204,38 @@ following content inside::
   # Generate DKIM keys (they will belong to the user running this job)
   *       *       *       *       *       root    umask 077 && $PYTHON $INSTANCE/manage.py modo manage_dkim_keys
 
+.. _policy_daemon:
+
+Policy daemon
+-------------
+
+Modoboa comes with a built-in `Policy Daemon for Postfix <http://www.postfix.org/SMTPD_POLICY_README.html>`_. Current features are:
+
+* Define daily sending limits for domains and/or accounts
+
+A `redis server <https://redis.io/>`_ is required to run this new daemon.
+
+You can launch it manually using the following command:
+
+.. sourcecode:: bash
+
+   (env)> python manage.py policy_daemon
+
+But we recommend an automatic start using ``systemd`` or
+``supervisor``. Here is a configuration example for ``supervisor``:
+
+.. sourcecode:: ini
+
+   [program:policyd]
+   autostart=true
+   autorestart=true
+   command=/srv/modoboa/env/bin/python /srv/modoboa/instance/manage.py policy_daemon
+   directory=/srv/modoboa
+   redirect_stderr=true
+   user=modoboa
+   numprocs=1
+
+It will listen by default on ``127.0.0.1`` and port ``9999``. The
+policy daemon won't do anything unless you tell :ref:`postfix <policyd_config>` to use it.
 
 Now you can continue to the :ref:`webserver` section.

doc/manual_installation/postfix.rst

@@ -65,3 +65,23 @@ Use the following configuration in the :file:`/etc/postfix/main.cf` file
 Replace ``<driver>`` by the name of the database you use.
 
 Restart Postfix.
+
+.. _policyd_config:
+
+Policy daemon
+-------------
+
+If you want to enable the built-in policy daemon, add the following
+content to the :file:`/etc/postfix/main.cf` file::
+
+    smtpd_recipient_restrictions =
+        # ...
+        check_policy_service inet:127.0.0.1:9999
+        # ...
+
+And reload postfix.
+
+.. note::
+
+   The ``check_policy_service`` line must be placed before the
+   ``permit_mynetworks`` one, otherwise the daemon won't be called.

doc/upgrade.rst

@@ -91,6 +91,20 @@ Rebuild Virtual Environment
 Specific instructions
 *********************
 
+1.16.0
+======
+
+A new :ref:`policy daemon <policy_daemon>` has been added. Make sure
+to have a Redis instance running on your server, then add the following
+settings to your ``settings.py`` file:
+
+.. sourcecode:: python
+
+REDIS_HOST = '<IP or hostname here>'
+REDIS_PORT = 6379
+REDIS_QUOTA_DB = 0
+REDIS_URL = 'redis://{}:{}/{}'.format(REDIS_HOST, REDIS_PORT, REDIS_QUOTA_DB)
+
 1.15.0
 ======