mox is an all-in-one email server designed to simplify running a secure, self-hosted mail service. It brings together the essential components of an email system without requiring administrators to configure and maintain numerous independent services.
The software is particularly appealing to individuals and organisations that want control over their own email domains. Its integrated approach covers message delivery, mailbox access, security, and administration, with a quickstart process that helps generate the initial configuration and required DNS records.
This is free and open source software.
Key Features
- Supports SMTP for receiving, submitting, and delivering email, including protocol extensions.
- Provides IMAP4 access to mailboxes from compatible desktop and mobile email clients.
- Includes webmail for reading, composing, organising, and sending messages through a browser.
- Implements SPF, DKIM, and DMARC authentication, including generation and processing of DMARC aggregate reports.
- Provides per-user Bayesian junk filtering that learns from messages classified as junk or legitimate email.
- Tracks sender reputation using host, domain, and email address information to inform filtering decisions.
- Delays suspicious senders and temporarily retains rejected messages to help diagnose incorrect classifications.
- Supports DANE, MTA-STS, REQUIRETLS, and TLS reporting to protect message transport.
- Automatically obtains and renews TLS certificates using ACME.
- Provides web-based administration for domains, accounts, aliases, configuration, and server status.
- Supports internationalised email addresses and domain names.
- Offers account autoconfiguration mechanisms for compatible email clients.
- Includes an HTTP/JSON API and webhooks for transactional email and delivery events.
- Provides Prometheus metrics and structured logging for monitoring and troubleshooting.
- Includes a local testing environment for developing and debugging email applications.
- Can serve static website content and act as a reverse proxy.
Website: github.com/mjl-/mox
Support:
Developer: Mechiel Lukkien
License: MIT License
mox is written in Go. Learn Go with our recommended free books and free tutorials.
Related Software
| Email Servers | |
|---|---|
| Exim | Highly configurable mail transfer agent |
| OpenSMTPD | Implementation of the server-side SMTP protocol with additional extensions |
| mox | Modern, secure, all-in-one email server |
| DBMail | Enables storing and retrieving mail messages from a database |
| WildDuck | Opinionated email server |
| Stalwart | All-in-one mail and collaboration server |
| Mailu | Self-hosted mail server stack |
| Mail-in-a-Box | Self-hosted email server solution |
| Postfix | Popular mail transfer agent |
| Maddy | Composable all-in-one mail server |
| Haraka | Modern SMTP server |
| Dovecot | Secure POP3 server that supports mbox and maildir mailboxes |
| Courier | Integrated mail/groupware server |
| Cyrus IMAP | Email, contacts and calendar server |
| Zimbra | Zimbra Collaboration Suite |
| Modoboa | Mail hosting and management platform |
| Citadel | Exchange-killer groupware server |
| chasquid | SMTP server with a focus on simplicity, security, and ease of operation |
| Sendmail | Mail transfer agent for sophisticated mail configurations |
| dma | DragonFly Mail Agent |
| DavMail | POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway |
Read our verdict in the software roundup.
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