OpenSMTPD

Secure SMTP server implementation from the OpenBSD project.

Official site ↗ Source code
Stars
576
License
ISC
Platform
C, deb
Version
7.8.0p1
Communication - Email - Mail Transfer Agents
Screenshot of OpenSMTPD Preview of the official site ↗

Similar alternatives

Haraka

★ 5,588

Fast, highly extensible, and event driven SMTP server.

Communication - Email - Mail Transfer Agents MIT

OpenTrashmail

★ 867

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.

Communication - Email - Mail Transfer Agents Apache-2.0

DragonFly

★ 259

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

Communication - Email - Mail Transfer Agents BSD-3-Clause

chasquid

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

Communication - Email - Mail Transfer Agents Apache-2.0

Courier MTA

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

Communication - Email - Mail Transfer Agents GPL-3.0

EmailRelay

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

Communication - Email - Mail Transfer Agents GPL-3.0