docker-mailserver

The containerized mail server combines SMTP, IMAP, LDAP, anti‑spam, and antivirus services into a single, production‑ready image. Configuration is performed through plain files rather than a SQL database, allowing version‑controlled, reproducible setups. A provided setup script automates initial configuration and maintenance, while environment variables let users adjust services such as Postfix, Dovecot, Rspamd, Amavis, SpamAssassin, ClamAV, OpenDKIM, OpenDMARC, Fail2ban, and Fetchmail/Getmail for message retrieval.

It targets administrators who need a self‑hosted, full‑stack mail solution that can be deployed and upgraded easily with Docker or compatible runtimes. The project emphasizes simplicity, versioned configuration, and extensibility through user‑supplied patches or custom scripts. Documentation covers basic installation, advanced options, security hardening, and integration with Let’s Encrypt, OAuth2, and other standards.

The software is open‑source under the MIT license, maintained by volunteers, and classified as stable, self‑hostable, and free of subscription or proprietary components.