Show HN: Posthorn, self-hosted mail gateway

Category: infrastructure

Tags: mail-gateway, self-hosted, transactional-email

Score: 7.0/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 7)

Posthorn is a unified outbound mail gateway for self-hosted apps, connecting HTTP form, HTTP API, and SMTP ingress to multiple transactional email providers. It solves the real problem of duplicating mail integration across each self-hosted service, with a clean architecture and excellent documentation.

Target audience: backend devs, devops

Repository: https://github.com/craigmccaskill/posthorn · Go · Apache-2.0 · 179 stars

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