Self-hosted communication - email - mail transfer agents

10 apps · 1 Docker-ready. All open-source; click through for license, source, and a docker-compose starter.

NameLicenseStackDocker
chasquid
SMTP (email) server with a focus on simplicity, security, and ease of operation.
Apache-2.0 Go
Courier MTA
Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services.
GPL-3.0 C/deb
DragonFly
A small MTA for home and office use. Works on Linux and FreeBSD.
BSD-3-Clause C
EmailRelay
A small and easy to configure SMTP and POP3 server for Windows and Linux.
GPL-3.0 C++
Exim
Message transfer agent (MTA) developed at the University of Cambridge.
GPL-3.0 C/deb
Haraka
Fast, highly extensible, and event driven SMTP server.
MIT Nodejs
OpenSMTPD
Secure SMTP server implementation from the OpenBSD project.
ISC C/deb
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.
Apache-2.0 Python/PHP/Docker Docker
Postfix
Fast, easy to administer, and secure Sendmail replacement.
IPL-1.0 C/deb
Sendmail
Message transfer agent (MTA).
Sendmail C/deb