SMRTR ProgrammingJul 23, 2026Hacker News

MX2 – A next-generation mail protocol sandbox in Python

SMRTR summary

MX2 (Mail eXchange 2.0) is a reference implementation for a next-generation federated messaging protocol designed to replace SMTP, IMAP, and POP3. It uses JSON-based exchanges over HTTP/3 (QUIC), HPKE end-to-end encryption, and a 5-tier automated trust grading system for spam routing. The sandbox runs with zero external dependencies and includes a CLI admin tool, Docker support, and unit tests.

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