Browse free open source Email Clients and projects for Mac below. Use the toggles on the left to filter open source Email Clients by OS, license, language, programming language, and project status.
Windows eml and mbox viewer.
A faster, leaner email client and fork of Nylas Mail
Open source email service with a strong focus on security and privacy
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
Wrappers around msmtp for use as queueing MTA with extra features
SaltOS, ERP, CRM, Business Management Suite, Josep Sanz Campderrós
BNM helps you design and send massive emails in HTML format