Mox
Modern, secure, all-in-one email server
Mox is an open source, MIT-licensed email server written in Go that consolidates all sending and receiving protocols into a single application. It addresses the complexity of running a modern email server, which traditionally requires integrating multiple separate components, often written in C, making maintenance and security challenging. Mox simplifies this by providing a unified, easy-to-operate solution that can be set up quickly for a domain.
Its main features include support for SMTP, IMAP4, SPF, DKIM, DMARC, DANE, MTA-STS, and DNSSEC. It offers reputation-based and content-based junk filtering, internationalized email (IDNA), automatic TLS certificates via ACME and Let's Encrypt, and account autoconfiguration. The server includes a webmail interface, a web admin interface, and a web API with webhooks. It is designed to be a complete, all-in-one email solution with a modern protocol stack.
Mox is intended for individuals or organizations who want to run their own email server and maintain control over their email. It is packaged as a free, open source project with no licensing fees. The software is available as a downloadable binary, and upgrades are typically performed by replacing the binary and restarting the server.
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