Postfix with smtp or ldap auth Dovecot for sasl, imap (and optional pop3) with ssl support, with ldap auth Dovecot is installed from the Dovecot Community Repo saslauthd with ldap auth Amavis Spamassasin supporting custom rules ClamAV with automatic updates OpenDKIM OpenDMARC Fail2ban Fetchmail Postscreen Postgrey basic Sieve support using dovecot LetsEncrypt and self-signed certificates Setup script to easily configure and maintain your mailserver persistent data and state (but think about backups!) Integration tests Automated builds on docker hub Plus addressing (a.k.a. extension delimiters) works out of the box: email for email@example.com go to firstname.lastname@example.org Why I created this image: Simple mail server with Docker Before you open an issue, please have a look this README, the Wiki and Postfix/Dovecot documentation. Requirements Recommended: 1 CPU 1-2GB RAM Swap enabled for the container Minimum: 1 CPU 512MB RAM Note: You'll need to deactivate some services like ClamAV to be able to run on a host with 512MB of RAM. Even with 1G RAM you may run into problems without swap, see FAQ.