This is a dockerized full-stack e-mail server. It is primarily based on openSUSE Leap (except MariaDB and Redis) and relies on openSUSE packages. It is prepared to be run as a Docker Compose project and uses a ready-to-use configuration which I built according to my preferences. Nevertheless, please feel free to suggest improvements or to change whatever you like in your personal setup.

• Postfix
  • MariaDB backend
  • SMTP/Submission (incl. TLS support)
  • Postscreen
• Dovecot
  • MariaDB backend
  • IMAP (incl. TLS support)
  • LMTP
  • Quota
  • Sieve
• Rspamd
  • Redis backend
  • ClamAV
  • DKIM
  • ARC
  • Greylisting
• Postfix Admin
  • MariaDB backend
• Roundcube Webmail
  • MariaDB backend
• Let's Encrypt
• HAProxy
  • SSL termination
• Graylog
  • MongoDB
  • Elasticsearch

tbd.

• Clone this project to a directory with a desired project name:

git clone https://github.com/cupracer/mailserver.git /opt/docker/compose/mail

• Prepare config files:

cd /opt/docker/compose/mail
cp docker-compose.yml.dist docker-compose.yml
cp env.dist .env

• Edit variables in .env (it's strongly advised to change all passwords!). Following are the defaults:

# Fully qualified domain name (FQDN) of the mail server instance
MYHOSTNAME=mail.example.de

# MySQ root password for shared Dovecot/Postfix/PostfixAdmin database
MYSQL_ROOT_PASSWORD=secret

# MySQ app password used by Dovecot/Postfix/PostfixAdmin
MYSQL_PASSWORD=secret

# MySQ root password for Roundcube database
ROUNDCUBE_MYSQL_ROOT_PASSWORD=secret

# MySQ app password used by Roundcube
ROUNDCUBE_MYSQL_PASSWORD=secret

# PostfixAdmin setup password to create admin users
POSTFIXADMIN_SETUP_PASSWORD=secret

# Password to access Rspamd web GUI
RSPAMD_WEB_PASSWORD=secret

# Use DKIM feature in Rspamd
RSPAMD_USE_DKIM=false

# Use ARC feature in Rspamd (requires RSPAMD_USE_DKIM)
RSPAMD_USE_ARC=false

# Rspamd and PostfixAdmin are secured by HTTP basic auth (user "admin")
WEB_PASSWORD=secret

• Star the project for the first time:

docker-compose up -d 

• Create an SSL certificate with Let's Encrypt:

docker-compose exec letsencrypt bash -c 'certbot certonly --standalone -d $MYHOSTNAME --deploy-hook /usr/local/sbin/restart-containers.py'

Please continue only if this was successful!

• Setup PostfixAdmin

  • Visit: https://MYHOSTNAME/postfixadmin/setup.php (to create db and admin user)
  • Create an admin user i.e. "admin@MYHOSTNAME"
  • Login as admin user: https://MYHOSTNAME/postfixadmin/
  • Create a new Domain for the FQDN of your mail server:

Domain: MYHOSTNAME
Description: default
Aliases: 0
Mailboxes: 0
Mailbox quota: 0
Domain quota: 0
is Backup MX: no
active: yes
add default aliases: yes

• Create additional domains as desired
• Add a first mailbox for the admin user:

User: USERNAME
Domain: MYHOSTNAME
...

• Add an alias for the default domain (FQDN of your mail server):

Alias: admin
Domain: MYHOSTNAME
To: name of the first mailbox

• Change aliases of default domain:

abuse, hostmaster, postmaster, webmaster --> admin@MYHOSTNAME

• Visit https://MYHOSTNAME/roundcubemail/ and login with you mailbox credentials.

• Visit https://MYHOSTNAME/rspamd/ to monitor Rspamd's activities.

• If you decided to use DKIM, please run the following command to get you DKIM public key:

docker-compose exec rspamd bash -c 'info.sh'

Have fun!