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mailu/docs/compose/setup.rst

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Docker Compose setup
====================
Prepare the environment
-----------------------
Mailu will store all of its persistent data in a path of your choice
(``/mailu`` by default) simply create the directory and move there:
.. code-block:: bash
mkdir /mailu
cd /mailu
Download the initial configuration file
---------------------------------------
Docker Compose configuration is stored in a file named
:download:`docker-compose.yml`. Additionally, Mailu
relies on a :download:`.env` file for various settings. Download
the proper template files from the git repository. To download the configuration
for the ``VERSION_TAG`` branch, use:
.. code-block:: bash
wget https://mailu.io/VERSION_TAG/_downloads/docker-compose.yml
wget https://mailu.io/VERSION_TAG/_downloads/.env
Important configuration variables
---------------------------------
Open the ``.env`` file and review the following variable settings:
- Change ``ROOT`` if you have your setup directory in a different location then ``/mailu``.
- Check ``VERSION`` to reflect the version you picked. (``master`` or ``1.5``).
Make sure to read the comments in the file and instructions from the :ref:`common_cfg` section.
TLS certificates
````````````````
Set the ``TLS_FLAVOR`` to one of the following
values:
- ``cert`` is the default and requires certificates to be setup manually;
- ``letsencrypt`` will use the *Letsencrypt!* CA to generate automatic ceriticates;
- ``mail`` is similar to ``cert`` except that TLS will only be served for
emails (IMAP and SMTP), not HTTP (use it behind reverse proxies);
- ``mail-letsencrypt`` is similar to ``letsencrypt`` except that TLS will only be served for
emails (IMAP and SMTP), not HTTP (use it behind reverse proxies);
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- ``notls`` will disable TLS, this is not recommended except for testing.
.. note::
When using *Letsencrypt!* you have to make sure that the DNS ``A`` and ``AAAA`` records for the
all hostnames mentioned in the ``HOSTNAMES`` variable match with the ip adresses of you server.
Or else certificate generation will fail! See also: :ref:`dns_setup`.
Bind address
````````````
Modify ``BIND_ADDRESS4`` and ``BIND_ADDRESS6`` to match the public IP addresses assigned to your server. For IPv6 you will need the ``<global>`` scope address.
You can find those addresses by running the following:
.. code-block:: bash
[root@mailu ~]$ ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 125.189.138.127 netmask 255.255.255.0 broadcast 5.189.138.255
inet6 fd21:aab2:717c:cc5a::1 prefixlen 64 scopeid 0x0<global>
inet6 fe2f:2a73:43a8:7a1b::1 prefixlen 64 scopeid 0x20<link>
ether 00:50:56:3c:b2:23 txqueuelen 1000 (Ethernet)
RX packets 174866612 bytes 127773819607 (118.9 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 19905110 bytes 2191519656 (2.0 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
If the address is not configured directly (NAT) on any of the network interfaces or if
you would simply like the server to listen on all interfaces, use ``0.0.0.0`` and ``::``. Note that running is this mode is not supported and can lead to `issues`_.
.. _issues: https://github.com/Mailu/Mailu/issues/641
Enable optional features
------------------------
Some of Mailu features are not used by every user and are thus not enabled in a
default configuration.
A Webmail is a Web interface exposing an email client. Mailu webmails are
bound to the internal IMAP and SMTP server for users to access their mailbox through
the Web. By exposing a complex application such as a Webmail, you should be aware of
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the security implications caused by such an increase of attack surface. The ``WEBMAIL``
configuration option must be one of the following:
- ``none`` is the default value, no Webmail service will be exposed;
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- ``roundcube`` will run the popular Roundcube Webmail;
- ``rainloop`` will run the popular Rainloop Webmail.
The administration interface is not exposed on the public address by default,
you will need to set the ``ADMIN`` variable accordingly:
- ``true`` will expose the admin interface in ``/admin``;
- ``false`` (or any other value) will disable this behaviour.
A Webdav server exposes a Dav interface over HTTP so that clients can store
contacts or calendars using the mail account. This can be enabled using the `WEBDAV`
setting. The configuration option must be one of the following:
- ``none`` is the default value, no webdav service will be exposed;
- ``radicale`` exposes the radicale Webdav service.
An antivirus server helps fighting large scale virus spreading campaigns
that leverage e-mail for initial infection. This can be setup using the ``ANTIVIRUS``
setting. The configuration option must be one of the following:
- ``none`` disables antivirus checks;
- ``clamav`` is the default values, the popular ClamAV antivirus is enabled.
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Make sure that you have at least 1GB of memory for ClamAV to load its signature
database.
If you run Mailu behind a reverse proxy you can use ``REAL_IP_HEADER`` and
``REAL_IP_FROM`` to set the values of respective the Nginx directives
``real_ip_header`` and ``set_real_ip_from``. The ``REAL_IP_FROM`` configuration
option is a comma-separated list of IPs (or CIDRs) of which for each a
``set_real_ip_from`` directive is added in the Nginx configuration file.
Finish setting up TLS
---------------------
Mailu relies heavily on TLS and must have a key pair and a certificate
available, at least for the hostname configured in the ``.env`` file.
If you set ``TLS_FLAVOR`` to ``cert`` or ``mail`` then you must create a ``certs`` directory
in your root path and setup a key-certificate pair there:
- ``cert.pem`` contains the certificate (override with ``TLS_CERT_FILENAME``),
- ``key.pem`` contains the key pair (override with ``TLS_KEYPAIR_FILENAME``).
Start Mailu
-----------
You may now start Mailu. Move the to the Mailu directory and run:
.. code-block:: bash
docker-compose up -d
Finally, you must create the initial admin user account:
.. code-block:: bash
docker-compose exec admin flask mailu admin me example.net password
This will create a user named ``me@example.net`` with password ``password`` and administration privileges. Connect to the Web admin interface and change the password to a strong one.