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Email Management

Open Source Alternatives

Find and compare the best open source alternatives to popular software tools. Get weekly recommendations in your inbox.

Postal faviconPostal

Postal is a complete, open-source mail delivery platform designed for sending high volumes of transactional and marketing emails.

15,873 stars
Last commit Aug 23, 2025
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Mail0 faviconMail0

Mail0 is an open source email application focused on privacy and security, offering a modern approach to email communication.

9,546 stars
Last commit Sep 2, 2025

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