Mox - modern, secure, all-in-one email server

Stay in control of your email and keep email decentralized!

Complete email solution: For sending and receiving email. With support for IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let's Encrypt, account autoconfiguration, webmail.
Quick & easy: Use the quickstart command to set up mox for your domain(s) within 10 minutes. You'll get a secure mail server with a modern protocol stack. Upgrades are mostly a matter of downloading the new version and restarting. Maintenance via web interface (easy) or config file (powerful). No dependencies.
High quality and secure: Mox has a modern Go code base with plenty of automated tests, automated integration tests, is manually tested against popular mail server and client software, and is fuzz-tested. The code is well-documented and cross-referenced with the relevant standards (RFC's).
Open Source: Mox is an open source project, source code is MIT-licensed.

See Features for the details, including roadmap.

Latest release

The latest release is v0.0.9, released on 2024-01-09, see release notes, download binaries, or see all releases.

News

2024-01-09, v0.0.9 released
2023-12-08, There will be a talk about mox in the "Modern Email" devroom at FOSDEM 2024 (Feb 3 & 4, Brussels). See you there!
2023-11-22, v0.0.8 released
2023-09-24, v0.0.7 released

Quickstart demo

Mox is real easy to set up. Get a machine, download the mox binary, run the quickstart, add the printed DNS records, and you're good to go. See the demo below, or continue reading at Install.

Background

Work on mox started in 2021. Admins were migrating their emails to just a few cloud/hosting providers. In part because running and maintaining email software had become more complicated over time: additional email protocols required yet another component in the software stack. Combining all these components into a working email server had become too troublesome over time. These components were also often written in C, a programming language where a small mistake typically has large consequences.

Mox is a modern email server that implements all modern email protocols in a single easy to use and maintain application.

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