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Email Delivery Service

Postal

Verified Sep 2026

A fully featured open source mail server

Self-host your email sending: full control over delivery for transactional volume.

The open-source mail server (atech): full transactional sending/receiving you self-host, with E SMTP, spam filtering and a web UI. The self-host Mailgun.

Who it's for

Teams who want a fully featured open-source mail server they can run themselves.

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