Open-source projects tagged “smtp”
Open-source and self-hostable projects tagged “smtp” on GitHub, with license, free-edition limits and setup checked against official sources.
- Listmonk
A self-hosted newsletter and mailing list manager that ships as a single binary and uses your own SMTP provider.
Stars24kLast commitOct 11, 2026LicenseAGPL-3.0 - Stalwart Mail Server
An all-in-one mail and collaboration server written in Rust, with JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV and WebDAV, offered in a free Community edition and a paid Enterprise edition.
Stars15kLast commitOct 11, 2026LicenseAGPL-3.0 - mailcow
A Docker-based mail server suite that bundles Postfix, Dovecot, Rspamd, SOGo webmail and a web admin interface.
Stars14kLast commitOct 6, 2026LicenseGPL-3.0
