mjl-/mox

Health v2 · maintenance only

Adoption not part of the score

5826 stars · 217 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Mox is an all-in-one, secure, open source mail server written in Go, combining SMTP, IMAP4, webmail, SPF/DKIM/DMARC, DANE/MTA-STS, automatic TLS via ACME, and spam filtering in a single binary. It is designed for low-maintenance self-hosted email, with a quickstart setup, web admin interface, HTTP/JSON API for transactional email, and a localserve mode for testing.

Use cases

• self-host email for my own domain
• run a modern SMTP and IMAP server
• send transactional email from my app via API
• replace Postfix/Dovecot/spam-filter stack with one service
• test email sending locally during development
• serve a website and mail from the same machine on port 443

When to choose

• you want a single all-in-one mail server that is quick to set up and low-maintenance
• you want modern email security (SPF/DKIM/DMARC, DANE, MTA-STS, REQUIRETLS) out of the box
• you want built-in webmail, admin UI, and an HTTP API for transactional email
• you prefer a memory-safe Go implementation over C-based mail servers

When to avoid

• you need a highly customized multi-component mail stack with separate MTA/IMAP/spam services
• you rely on direct filesystem access to mailboxes in Maildir format
• you need features mox explicitly does not support per its roadmap
• you need battle-tested decades-old software for very large-scale deployments

Facets

application · maturity active

email http-server web-framework monitoring security self-hosted cli email self-hosted networking security developer-tools go cross-platform self-hosted mail-server smtp imap webmail spf dkim dmarc dane mta-sts acme spam-filtering jmap-alternative transactional-email linux docker web-server

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markdown · JSON · MCP: product_card(name="mjl-/mox")