Open Source Communication - Email - Mail Transfer Agents Software

Found 10 self-hosted alternatives in this category.

Apache-2.0

chasquid

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

GPL-3.0

Courier MTA

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

Website Source

BSD-3-Clause

DragonFly

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

Website Source

GPL-3.0

EmailRelay

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

Website Source

GPL-3.0

Exim

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

Website Source

MIT

Haraka

Fast, highly extensible, and event driven SMTP server

Website Source

ISC

OpenSMTPD

Secure SMTP server implementation from the OpenBSD project

Website Source

Apache-2.0

OpenTrashmail

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

IPL-1.0

Postfix

Fast, easy to administer, and secure Sendmail replacement

Website Source

Sendmail

Message transfer agent (MTA)

Website Source