Open Source Communication - Email - Mail Transfer Agents Software

Found 10 self-hosted alternatives in this category.

chasquid

Apache-2.0Go

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

Courier MTA

GPL-3.0C/deb

Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services

Website Source

DragonFly

BSD-3-ClauseC

A small MTA for home and office use. Works on Linux and FreeBSD

Website Source

EmailRelay

GPL-3.0C++

A small and easy to configure SMTP and POP3 server for Windows and Linux

Website Source

Exim

GPL-3.0C/deb

Message transfer agent (MTA) developed at the University of Cambridge

Website Source

Haraka

MITNodejs

Fast, highly extensible, and event driven SMTP server

Website Source

OpenSMTPD

ISCC/deb

Secure SMTP server implementation from the OpenBSD project

Website Source

OpenTrashmail

Apache-2.0Python/PHP/Docker

Complete trashmail solution that exposes an SMTP server and has a web interface to manage received emails. Works with multiple and wildcard domains and is fully file based (no database needed). Includes RSS feeds and JSON API

Website Source

Postfix

IPL-1.0C/deb

Fast, easy to administer, and secure Sendmail replacement

Website Source

Sendmail

SendmailC/deb

Message transfer agent (MTA)

Website Source