About Mailu
Mailu is a free, open-source mail server suite designed to be easy to set up and maintain. It provides standard email protocols (SMTP, IMAP, POP3), multiple webmail clients (Roundcube, Snappymail), antispam, antivirus, and a complete admin interface. Supports domain aliases, auto-forward, and fetched accounts.
Mailu is known for its simplicity and reliability. It uses Nginx as the web server, Dovecot for IMAP, Postfix for SMTP, and Rspamd for spam filtering all containerized with Docker Compose.
Key Features
- Lightweight Docker-based mail server with admin web interface
- Automatic LetsEncrypt certificate management
- Spam filtering, antivirus, and greylisting built in
- Roundcube webmail included with sieve filter support
Self-Hosting Notes
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