• installs Docker and docker-compose
• installs and configures mailcow-dockerized
• option to install RainLoop Webmail
• option to install NextCloud
• option to add mailserver firewall rules
• option to add a backup cron job

Details and documentation:

• https://github.com/mailcow/mailcow-dockerized
• https://mailcow.github.io/mailcow-dockerized-docs/
• https://mailcow.email/
• https://www.servercow.de/mailcow

• Debian 9 Stretch or Debian 10 Buster
• or RancherOS with Alpine console
• 1.5 to 2 GB RAM

• mailcow: dockerized requires some ports to be open for incoming connections, so make sure that your firewall is not blocking these.

• Make sure that no other application is interferring with mailcow's configuration, such as another mail service

• A correct DNS setup is crucial to every good mailserver setup, so please make sure you got at least the basics covered before you begin!

• Make sure that your system has a correct date and time setup. This is crucial for stuff like two factor TOTP authentication.

• Prerequisites: https://mailcow.github.io/mailcow-dockerized-docs/prerequesite-system/

• DNS: https://github.com/mailcow/mailcow/wiki/DNS-records

• imapsync

At a minimum set your Server IP, Fully Qualified Domain Name and Timezone in defaults/main.yml

[servers]
OnDebian    ansible_host=mail.example.org
OnRancherOS ansible_ssh_host=mail.example.com ansible_ssh_user=rancher ansible_python_interpreter=/usr/bin/python3

- hosts: servers
  user: root
  become: True
  roles:
     - ansible-mailcow

• For Debian or RancherOS: ansible-playbook -v mailcow.yml

MIT

Christian Wagner