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SMTP (email) server with a focus on simplicity, security, and ease of operation [ CLI ] [ Beta ]


Easy to configure.
Hard to mis-configure in ways that are harmful or insecure (e.g. no open relay, or clear-text authentication).
Monitoring HTTP server, with exported variables and tracing to help debugging.
Integrated with Debian and Ubuntu.
Supports using Dovecot for authentication.


Multiple/virtual domains, with per-domain users and aliases.
Suffix dropping (user+something@domain → user@domain).
Hooks for integration with greylisting, anti-virus, anti-spam, and DKIM/DMARC.
International usernames (SMTPUTF8) and domain names (IDNA).


Tracking of per-domain TLS support, prevents connection downgrading.
Multiple TLS certificates.
Easy integration with Let's Encrypt.
SPF and MTA-STS checking.

Documentation :
installation :

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