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Open-source repos for email hosting

5 repos tagged Email hosting, sorted by GitHub stars. Add filters from the other category types to narrow the list.

5repos tagged Email hosting

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  1. docker-mailserver/docker-mailserver

    Mail server in a single container with SMTP, IMAP, antispam and antivirus, configured by files.

    Docker, Email, Operations, Self hosters

    19.7k starsMITUpdated 3 Nov 2026

  2. postalserver/postal

    Mail delivery platform for sending transactional and bulk email from your own servers, like a self-hosted SendGrid.

    Email campaigns, Email, Engineering, Operations, SaaS, Self hosters, Solo founders

    16.9k starsMITUpdated 30 Oct 2026

  3. stalwartlabs/stalwart

    All-in-one mail and collaboration server in Rust supporting JMAP, IMAP, SMTP, CalDAV and CardDAV.

    Email, Operations, Self hosters

    15.7k starsUpdated 2 Nov 2026

  4. mail-in-a-box/mailinabox

    Turnkey setup that turns an Ubuntu server into a complete mail server with webmail, DNS and backups.

    Email, Operations, Self hosters

    15.5k starsCC0-1.0Updated 22 Oct 2026

  5. mailcow/mailcow-dockerized

    Full mail server suite in Docker with SMTP, IMAP, webmail, antispam and an admin UI.

    Docker, Email, Operations, IT and security, Self hosters

    13.7k starsGPL-3.0Updated 2 Nov 2026