Browse free open source Email Servers and projects for Mac below. Use the toggles on the left to filter open source Email Servers by OS, license, language, programming language, and project status.
The classic email sending library for PHP
Web and API based SMTP testing
Take back control of your email with this mail server in a box
The fake smtp email server for development and testing
Zentyal is a Linux Small Business Server
A fast, highly extensible, and event driven SMTP server
Mail hosting made simple
mailcow: dockerized
Linux Mail Server with Calendaring and IM
Fast and easy-to-use webmail front-end for your existing mail server.
CheckeredFlag is a super simple mail server.