# Integrate mlmmj mailing list manager in iRedMail (PostgreSQL backend)

[TOC]

## Summary

In iRedMail-0.9.8, we integrate mlmmj (<http://mlmmj.org>) - a simple and slim
mailing list manager. It uses very few resources, and requires no daemons, easy
to install, configure and manage. if offers a great set of features, including:

* Archive
* Subject prefix
* Subscribers only posting
* Moderators only posting
* Moderation functionality
* Custom headers / footer
* Fully automated bounce handling
* Complete requeueing functionality
* Regular expression access control
* Delivery Status Notification (RFC1891) support
* Rich, customisable texts for automated operations
* and more

With mlmmj integration, you can create as many mailing lists as you want. End
user can subscribe to mailing list `listname@domain.dom` by sending email to
`listname+subscribe@domain.com`, unsubscribe from the list by sending email to
`listname+unsubscribe@domain.com`. Of course you can disable the subscription
and unsubscription with a setting.

iRedMail team also developes a simple RESTful API server called `mlmmjadmin`
to help manage mailing lists, it also offers script tool to manage mailing
lists from command line.

We will show you how to integrate both mlmmj and mlmmjadmin in this tutorial.

## Backup SQL database first

Although we don't modify any existing SQL data in this tutorial, but it's
a good idea to backup it now before you adding any new mailing lists.

Please run command `bash /var/vmail/backup/backup_pgsql.sh` to backup SQL
databases.

## Install mlmmj package

!!! attention

    Package `uwsgi` is required by the RESTful API server `mlmmjadmin`.

* On RHEL/CentOS, `mlmmj` is available in `EPEL` repo, and it's enabled in
  iRedMail by default. So we can install it directly:

```
yum install mlmmj uwsgi uwsgi-plugin-python2 uwsgi-logger-syslog python-requests
```

* On Debian/Ubuntu:

```
apt-get install mlmmj uwsgi uwsgi-plugin-python python-requests
```

* On FreeBSD:

```
cd /usr/ports/mail/mlmmj
make install clean
cd /usr/ports/www/uwsgi
make install clean
cd /usr/ports/www/py-requests
make install clean
```

* On OpenBSD (iRedMail always installs `uwsgi` during installation, so no need
  to install it here):

```
pkg_add mlmmj altermime
```

## Create required system account

mlmmj will be ran as user `mlmmj` and group `mlmmj`, all mailing list data will
be stored under its home directory `/var/vmail/mlmmj`:

On Linux or OpenBSD:

```
groupadd mlmmj
useradd -m -g mlmmj -d /var/vmail/mlmmj -s /sbin/nologin mlmmj
mkdir /var/vmail/mlmmj-archive
chown -R mlmmj:mlmmj /var/vmail/mlmmj /var/vmail/mlmmj-archive
chmod -R 0700 /var/vmail/mlmmj /var/vmail/mlmmj-archive
chmod 0755 /var/vmail           # Make sure this directory is accessible by other users
```

On FreeBSD:

```
pw groupadd mlmmj
pw useradd mlmmj -m -g mlmmj -s /sbin/nologin -d /var/vmail/mlmmj
mkdir /var/vmail/mlmmj-archive
chown -R mlmmj:mlmmj /var/vmail/mlmmj /var/vmail/mlmmj-archive
chmod -R 0700 /var/vmail/mlmmj /var/vmail/mlmmj-archive
chmod 0755 /var/vmail           # Make sure this directory is accessible by other users
```

## Update SQL tables in `vmail` database

We need some updates in `vmail` SQL database:

* new SQL table `maillists`: used to store profile of mailing list.
* new SQL column `forwardings.is_maillist`
* new SQL column `domain.maillists`: used to set per-domain limit of mailing
  list accounts. This column is mostly used by iRedAdmin-Pro.

This SQL structure was introduced in iRedMail-0.9.8, if you're running
an old iRedMail release, please upgrade iRedMail to the latest stable release
by following our tutorials first:

* [iRedMail Upgrade Tutorials](./iredmail.releases.html)

## Postfix integration

* Please add lines below in Postfix config file `/etc/postfix/master.cf`:

    !!! attention

        * Command `/usr/bin/mlmmj-amime-receive` doesn't exist yet, we will
          create it later.
        * On FreeBSD and OpenBSD, it should be
          `/usr/local/usr/bin/mlmmj-amime-receive` instead.

```
# ${nexthop} is '%d/%u' in transport ('mlmmj:%d/%u')
mlmmj   unix  -       n       n       -       -       pipe
    flags=ORhu user=mlmmj argv=/usr/bin/mlmmj-amime-receive -L /var/vmail/mlmmj/${nexthop}
```

* Add line below in Postfix config file `/etc/postfix/main.cf`:

```
mlmmj_destination_recipient_limit = 1
```

* Open Postfix config file `/etc/postfix/main.cf`, update existing parameter
  `transport_maps`, add new sql lookup like below. We will create required sql
  lookup file later.

```
transport_maps =
    proxy:pgsql:/etc/postfix/pgsql/transport_maps_user.cf
    proxy:pgsql:/etc/postfix/pgsql/transport_maps_maillist.cf   # <- Add this line
    ...
```

* Now create file `/etc/postfix/pgsql/transport_maps_maillist.cf`:

!!! warning

    Please update the `password =` line with the real password of SQL user
    `vmail`, you can find it in files under `/etc/postfix/pgsql/`.

```
hosts       = 127.0.0.1
port        = 5432
user        = vmail
password    = qsescZvV03f6YUtTMN2bQTejmjatzz
dbname      = vmail
query       = SELECT maillists.transport FROM maillists,domain WHERE maillists.address='%s' AND maillists.active=1 AND maillists.domain = domain.domain AND domain.active=1
```

* Run commands below to create file `/usr/bin/mlmmj-amime-receive` (Linux) or
  `/usr/local/bin/mlmmj-amime-receive` (FreeBSD/OpenBSD):

!!! attention

    mlmmj doesn't support signature signing very well, so we follow mlmmj
    official document and create this script to sign signature properly with
    command `altermime`. All iRedMail installation should have command
    `altermime` (package `AlterMIME`) available, so you don't need to install
    it manually

On Linux:

```
cd /usr/bin/
wget https://github.com/iredmail/iRedMail/raw/1.0/samples/mlmmj/mlmmj-amime-receive
chown mlmmj:mlmmj mlmmj-amime-receive
chmod 0550 mlmmj-amime-receive
```

On FreeBSD or OpenBSD:

```
cd /usr/local/bin/
wget https://github.com/iredmail/iRedMail/raw/1.0/samples/mlmmj/mlmmj-amime-receive
chown mlmmj:mlmmj mlmmj-amime-receive
chmod 0550 mlmmj-amime-receive
```

## Amavisd Integration

We need Amavisd to listen on one more port `10027`, it will be used to scan
spam/virus for emails posted to mailing list.

* Please open Amavisd config file, find parameter `$inet_socket_port`, add new
  port number `10027` in the list, like below:
    - On RHEL/CentOS, it's `/etc/amavisd/amavisd.conf`.
    - On Debian/Ubuntu, it's `/etc/amavis/conf.d/50-user`.
    - On OpenBSD, it's `/etc/amavisd.conf`.
    - On FreeBSD, it's `/usr/local/etc/amavisd.conf`.

```
$inet_socket_port = [10024, 10026, 10027, 9998];
```

* Add lines below in Amavisd config file. It creates a new policy bank called
  `MLMMJ` for emails submitted by mlmmj from port 10027. The purpose is signing
  DKIM key on outgoing emails sent by mailing list, but disable
  spam/virus/banned/bad-header checks, because emails sent to mailing list will
  be scanned either on port 10024 (incoming email from external senders) or
  10026 (outgoing email sent by smtp authenticated users).

```
$interface_policy{'10027'} = 'MLMMJ';
$policy_bank{'MLMMJ'} = {
    originating => 1,           # declare that mail was submitted by our smtp client
    allow_disclaimers => 0,     # mailing list should use footer text instead.
    enable_dkim_signing => 1,   # sign DKIm signature
    smtpd_discard_ehlo_keywords => ['8BITMIME'],
    terminate_dsn_on_notify_success => 0,  # don't remove NOTIFY=SUCCESS option
    bypass_spam_checks_maps => [1],     # don't check spam
    bypass_virus_checks_maps => [1],    # don't check virus
    bypass_banned_checks_maps => [1],   # don't check banned file names and types
    bypass_header_checks_maps => [1],   # don't check bad header
};
```

Now restart Amavisd and Postfix service, mlmmj mailing list manager is now
fully integrated.

We will setup `mlmmjadmin` program to make managing mailing lists easier.

## Setup mlmmjadmin: RESTful API server used to manage mlmmj mailing lists

* Download the latest mlmmjadmin release: <https://github.com/iredmail/mlmmjadmin/releases>,
  extract downloaded package to `/opt/` directory, and create a symbol link:

    !!! attention

        We use version `2.1` for example below.

```
cd /root/
wget https://github.com/iredmail/mlmmjadmin/archive/2.1.tar.gz
tar zxf 2.1.tar.gz -C /opt
rm -f 2.1.tar.gz
ln -s /opt/mlmmjadmin-2.1 /opt/mlmmjadmin
```

* Generate config file by copying sample file, `settings.py.sample`:

```
cd /opt/mlmmjadmin
cp settings.py.sample settings.py
chown mlmmj:mlmmj settings.py
chmod 0400 settings.py
```

* Generate a random, long string as API auth token, it will be used by your
  API client. For example:

```
$ echo $RANDOM | md5sum
43a89b7aa34354089e629ed9f9be0b3b
```

* Add this string in `/opt/mlmmjadmin/settings.py`, parameter `api_auth_tokens`
  like below:

```
api_auth_tokens = ['43a89b7aa34354089e629ed9f9be0b3b']
```

You can add as many token as you want for different API clients. For example:

```
api_auth_tokens = ['43a89b7aa34354089e629ed9f9be0b3b', '703ed37b20243d7c51c56ce6cd90e94c']
```

* if you manage mail accounts __WITH__ iRedAdmin-Pro, please set values of
  parameters `backend_api` and `backend_cli` in `/opt/mlmmjadmin/settings.py`
  like below:

```
backend_api = 'bk_none'
backend_cli = 'bk_iredmail_sql'
```

* if you do __NOT__ manage mail accounts with iRedAdmin-Pro, please set values
  of parameters `backend_api` and `backend_cli` in `/opt/mlmmjadmin/settings.py`
  like below:

```
backend_api = 'bk_iredmail_sql'
backend_cli = 'bk_iredmail_sql'
```

* Add extra required parameters in `/opt/mlmmjadmin/settings.py`, so that
  mlmmjadmin can connect to SQL server and manage mailing lists.

    !!! attention

        You can find SQL server address, port, database name, SQL username and
        password in iRedAdmin config file, the SQL user must have both read and
        write privileges to manage `vmail` database. iRedMail server usually
        use SQL user `vmailadmin` for this purpose.

```
iredmail_sql_db_type = 'pgsql'
iredmail_sql_db_server = '127.0.0.1'
iredmail_sql_db_port = 5432
iredmail_sql_db_name = 'vmail'
iredmail_sql_db_user = 'vmailadmin'
iredmail_sql_db_password = '<password>'
```

* Add extra required parameters in `/opt/mlmmjadmin/settings.py` to use the
  directory used to store mailing lists:

```
MLMMJ_SPOOL_DIR = '/var/vmail/mlmmj'
MLMMJ_ARCHIVE_DIR = '/var/vmail/mlmmj-archive'
MLMMJ_DEFAULT_PROFILE_SETTINGS.update({'smtp_port': 10027})
```

* If you're running OpenBSD or FreeBSD, please add parameter `MLMMJ_SKEL_DIR`
  in `/opt/mlmmjadmin/settings.py` to set the directory which stores mlmmj mail
  templates:

```
MLMMJ_SKEL_DIR = '/usr/local/share/mlmmj/text.skel'
```

* Copy rc/systemd scripts for service control:

```
#
# For RHEL/CentOS 6
#
cp /opt/mlmmjadmin/rc_scripts/mlmmjadmin.rhel /etc/init.d/mlmmjadmin
chmod 0755 /etc/init.d/mlmmjadmin
chkconfig --level 345 on mlmmjadmin

#
# For RHEL/CentOS
#
cp /opt/mlmmjadmin/rc_scripts/systemd/rhel.service /lib/systemd/system/mlmmjadmin.service
chmod 0644 /lib/systemd/system/mlmmjadmin.service
systemctl daemon-reload
systemctl enable mlmmjadmin

#
# For Debian 8, Ubuntu 14.04 and earlier releases which does NOT use systemd
#
cp /opt/mlmmjadmin/rc_scripts/mlmmjadmin.debian /etc/init.d/mlmmjadmin
chmod 0755 /etc/init.d/mlmmjadmin
update-rc.d mlmmjadmin defaults

#
# For Debian 9 and Ubuntu 16.04 which uses systemd
#
cp /opt/mlmmjadmin/rc_scripts/systemd/debian.service /lib/systemd/system/mlmmjadmin.service
chmod 0644 /lib/systemd/system/mlmmjadmin.service
systemctl daemon-reload
systemctl enable mlmmjadmin

#
# For FreeBSD
#
cp /opt/mlmmjadmin/rc_scripts/mlmmjadmin.freebsd /usr/local/etc/rc.d/mlmmjadmin
chmod 0755 /usr/local/etc/rc.d/mlmmjadmin
echo 'mlmmjadmin_enable=YES' >> /etc/rc.conf.local

#
# For OpenBSD
#
cp /opt/mlmmjadmin/rc_scripts/mlmmjadmin.openbsd /etc/rc.d/mlmmjadmin
chmod 0755 /etc/rc.d/mlmmjadmin
rcctl enable mlmmjadmin
```


* Create directory used to store mlmmjadmin log file. mlmmjadmin is
  configured to log to syslog directly.

```
#
# For RHEL/CentOS
#
mkdir /var/log/mlmmjadmin
chown root:root /var/log/mlmmjadmin
chmod 0755 /var/log/mlmmjadmin

#
# For Debian
#
mkdir /var/log/mlmmjadmin
chown root:adm /var/log/mlmmjadmin
chmod 0755 /var/log/mlmmjadmin

#
# For Ubuntu
#
mkdir /var/log/mlmmjadmin
chown syslog:adm /var/log/mlmmjadmin
chmod 0755 /var/log/mlmmjadmin

#
# For OpenBSD/FreeBSD
#
mkdir /var/log/mlmmjadmin
chown root:wheel /var/log/mlmmjadmin
chmod 0755 /var/log/mlmmjadmin
```

* Update syslog daemon config file to log mlmmjadmin to dedicated log file:

For Linux

```
cp /opt/mlmmjadmin/samples/rsyslog/mlmmjadmin.conf /etc/rsyslog.d/
service rsyslog restart
```

For OpenBSD, please append below lines in `/etc/syslog.conf`:

```
!!mlmmjadmin
local5.*            /var/log/mlmmjadmin/mlmmjadmin.log
```

For FreeBSD, please append below lines in `/etc/syslog.conf`:

```
!mlmmjadmin
local5.*            /var/log/mlmmjadmin/mlmmjadmin.log
```

* Now it's ok to start `mlmmjadmin` service, it listens on `127.0.0.1:7790`
  by default:

```
#
# On Linux/FreeBSD:
#
service mlmmjadmin restart

#
# On OpenBSD
#
rcctl start mlmmjadmin
```

On Linux, you can check the port number with command `netstat` or `ss` like below:

```
netstat -ntlp | grep 7790
ss -ntlp | grep 7790
```

On FreeBSD/OpenBSD, run:

```
netstat -anl -p tcp | grep 7790
```

## Manage subscribeable mailing lists

Please read document [Manage subscribeable mailing lists](./manage.subscribeable.mailing.lists.html).

## References

* Mlmmj:
    * [web site](http://mlmmj.org/)
    * [Tunable parameters](http://mlmmj.org/docs/tunables/)
    * [Postfix integration](http://mlmmj.org/docs/readme-postfix/)
* [mlmmjadmin](https://github.com/iredmail/mlmmjadmin): RESTful API server used to manage mlmmj mailing lists. Developed
  and maintained by iRedMail team.

## See Also

* [Integrate mlmmj mailing list manager in iRedMail (OpenLDAP backend)](./integration.mlmmj.ldap.html)
* [Integrate mlmmj mailing list manager in iRedMail (MySQL/MariaDB backends)](./integration.mlmmj.mysql.html)
* [Integrate mlmmj mailing list manager in iRedMail (PostgreSQL backend)](./integration.mlmmj.pgsql.html)
