Open Source Email Servers Projects

Self-hostable mail servers and groupware solutions for running your own email infrastructure.

Inbucket

Open source disposable email testing server with built-in SMTP, POP3, REST, and web interfaces — no database required.

Alternative to:

Mailtrap

Mailcow

Self-hostable, Dockerized mail server bundle that combines Postfix, Dovecot, and a polished web UI — a Gmail and Microsoft 365 alternative for organisations.

Alternative to:

Gmail