Open source Email clients for MAC OS X


Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows! Mailspring is a new version of Nylas Mail maintained by one of the original authors. (GPL)

Linux - Windows - MAC OS X


N1 is an open-source mail client built on the modern web with Electron, React, and Flux. It is designed to be extensible, so it's easy to create new experiences and workflows around email. (GPL)



Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). (GPL)

Linux - FreeBSD - Windows - MAC OS X


Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. (MPL)

Linux - FreeBSD - Windows - MAC OS X

4 applications