maddy is a composable all-in-one mail server that brings the main pieces of a self-hosted email stack into a single daemon with a unified configuration model.
It can send mail via SMTP, receive mail as an MX, store messages for IMAP access, and implement important mail security standards such as DKIM, SPF, DMARC, DANE, and MTA-STS. The project is designed to reduce the maintenance burden of running multiple separate services, although its built-in IMAP storage is currently described by the project as beta.
This is free and open source software.
Key Features
- Includes automatic certificate management via ACME.
- Offers OpenMetrics/Prometheus telemetry.
- Supports multiple authentication providers including PAM, /etc/shadow, LDAP BindDN, Dovecot SASL, and Native NetAuth.
- Provides flexible storage and routing options including filesystem and Amazon S3 blob storage, local queue, remote MX delivery, and SMTP/LMTP forwarding.
- Ships with documentation and tutorials covering Docker, multi-domain setups, outbound delivery security, and integration with software such as Dovecot, rspamd, and Mailman 3.
- IMAP storage is currently beta.
Website: github.com/foxcpp/maddy
Support:
Developer: foxcpp
License: GNU General Public License v3.0
maddy 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 |
| Postfix | Popular mail transfer agent |
| 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 |
| 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 |
| qmail | Written as a more secure replacement for the Sendmail program |
| dma | DragonFly Mail Agent |
| DavMail | POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway |
Read our verdict in the software roundup.
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