GitHub - toinbox/simplerelay: SimpleRelay - Self-hosted SMTP relay with web dashboard, DNS validation, and per-sender access control (FastAPI/Postfix/Docker)

▤ Summary

SimpleRelay introduces a self-hosted SMTP relay that routes outbound email through multiple upstream providers based on sender address. The platform includes a web dashboard, DNS validation, per-sender access control, mail logs, and an admin console for user and proxy management. It ships as a Docker Compose stack built with FastAPI, Postfix, PostgreSQL, and React/Vite, and it supports setup for verification and password reset email delivery. The project also emphasizes local-network use, provider whitelisting, and no-open-relay controls for safer email routing.

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