Mailu
Mailu is a simple yet full-featured mail server as a set of Docker images.
esmtp
esmtp is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail compatible syntax.
Haraka
Open source SMTP server written in Node.js.
blat
Blat is a small, efficent SMTP command line mailer for Windows.
sendEmail
sendEmail is a lightweight, command line SMTP email client.
msmtp
msmtp is an SMTP client.
MailerQ
MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email messages at very high speeds.
Archiveopteryx
Archiveopteryx stores email in a database and provides access to it through IMAP and more.
Dovecot
Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with…
Dragonfly Mail Agent
A small Mail Transport Agent (MTA), designed for home and office use. Part of …