Best Open Source Email Software

A collection of the best open source Email tools. Find the best tools for Email that are open source and free to use/self-hostable.

Open source email app to reach inbox zero fast.

A fully featured open source mail delivery platform for incoming & outgoing e-mail

Self-hosted newsletter and mailing list manager

Modern email for teams and professionals. A replacement for outdated email technology and tools.

A reliable and easy-to-use email newsletter tool. An Open Source alternative to Mailchimp that you can host yourself.

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