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cupracer/mailserver

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.

Features / Technologies

  • 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

Why?

tbd.

Install

  • 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!

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

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

Have fun!