Open Source
Software We Give Back
Tools we built for our own infrastructure, released free and open source under BSD-2-Clause. No account, no signup, no paid tier.
SecureMilter
SPF, DKIM, DMARC, and ARC milters for Postfix. RFC 7208, RFC 6376, RFC 7489, and RFC 8617, security audited and RFC-conformance tested.
Learn more →Mail MCP
A Model Context Protocol server giving AI assistants full IMAP/SMTP email access — search, read, send, reply, organize. Single-file PHP, 22 tools.
Learn more →xmppd
A carrier-grade XMPP server written in Zig, inspired by Postfix's architecture — thread-per-core, DANE-first federation, pluggable storage and auth.
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