lcpo / chasquid

[mirror] SMTP (email) server

chasquid

chasquid is an SMTP (email) server.

It aims to be easy to configure and maintain for a small mail server, at the expense of flexibility and functionality.

It's written in Go, and distributed under the Apache license 2.0.

Features

• Easy to configure.
• Hard to mis-configure in ways that are harmful or insecure (e.g. no open relay, or clear-text authentication).
• Tracking of per-domain TLS support, prevents connection downgrading.
• International usernames (SMTPUTF8) and domain names (IDNA).
• Hooks for easy integration with greylisting, anti-virus and anti-spam.
• Multiple domains, with per-domain user database and aliases.
• Multiple TLS certificates.
• Suffix dropping (user+something@domain → user@domain).
• Easy integration with Let's Encrypt.
• SPF checking.
• Monitoring HTTP server, with exported variables and tracing to help debugging.
• Supports using Dovecot for authentication (experimental).

The following are intentionally not implemented:

• Custom email routing.
• DKIM/DMARC checking (although the post-data hook can be used for it).

Status

chasquid is in beta.

It's functional and has had some production exposure, but some things may still change in backwards-incompatible way, including the configuration format. It should be rare and will be avoided if possible.

You can subscribe to the mailing list to get notifications of such changes, which are also documented in the UPGRADING file.

Documentation

Check out the how-to or the installation guide for more details on how to install and configure chasquid.

Contact

If you have any questions, comments or patches please send them to the mailing list, [email protected].

To subscribe, send an email to [email protected].

You can also browse the archives.