chasquid is a free, open-source SMTP server written in Go for simple, secure self-hosted email. Learn its features, security model, and setup basics.
chasquid is a free, open-source SMTP email server written in Go and released under the Apache License 2.0. It is maintained by independent developer Alberto Bertogli and is designed as a simpler, more secure-by-default alternative to established mail transfer agents like Postfix and Exim.
The project targets individuals and small groups who want to self-host their own email infrastructure, prioritizing configurations that are hard to get wrong in insecure ways over the flexibility of a fully general-purpose MTA.
chasquid supports virtual domains and aliases, DKIM signing and verification, SPF and MTA-STS validation, and TLS downgrade protection, along with internationalized usernames and domains (SMTPUTF8/IDNA).
It integrates with Dovecot for authentication, supports Let's Encrypt for automatic TLS certificates, and exposes a monitoring HTTP endpoint for debugging, while leaving spam and antivirus filtering to external hook-based tools.
chasquid is completely free and open source with no paid tiers, subscriptions, or hosted offering from the maintainer. Users self-host it on their own infrastructure (a VPS or on-premise server) and are responsible for their own hosting costs, backups, and uptime.
chasquid is a free, open-source SMTP email server written in Go, designed for simple and secure self-hosted email.
Yes, chasquid is completely free and open source under the Apache License 2.0.
Yes, chasquid supports DKIM signing/verification and is designed to integrate easily with Let's Encrypt for automatic TLS certificates.
chasquid is developed and maintained by Alberto Bertogli as an independent open-source project.
chasquid is aimed at technically proficient users comfortable with Linux administration and configuration files; it has no graphical setup wizard.
No, chasquid only handles mail transport (SMTP); it is typically paired with an IMAP server like Dovecot and a separate mail client.