Host Communication - Email - Mail Transfer Agents Tools

Modern SMTP server designed with a focus on security, speed, and extensive configurability.

Mail Transfer Library built on Python.

Message transfer agent (MTA).

Fast, easy to administer, and secure Sendmail replacement.

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.

Secure SMTP server implementation from the OpenBSD project.

Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development.

High-performance, pluginable SMTP server written in Javascript.

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

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

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

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

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