Show HN: Posthorn, self-hosted mail without the mail server

Summary

Posthorn is a self-hosted email solution that eliminates the need for a dedicated mail server, allowing users to host their email infrastructure on their own servers. It was showcased on Hacker News.

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Hacker News Front Page

Show HN: Posthorn, self-hosted mail without the mail server

5/27/2026, 1:01:25 PM

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Local fixture mode allows posting. Production posting requires Google login and write-rate limits.

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