Modernize your mail server
Self-hosting your mail server has been notoriously difficult. Not anymore! Stalwart is a scalable, secure and robust open-source mail server software designed for the 21st century.
Designed around JMAP, a modern protocol for accessing e-mails and other data.
Built to scale
Scales to millions of users thanks to FoundationDB.
Powered by Rust
Incredibly fast while ensuring memory safety. No runtimes or garbage collectors.
Stalwart JMAP is an open-source JSON Meta Application Protocol server designed to be robust, secure and scalable.
Secure. Written in Rust.
Scalable and fault-tolerant.
Stalwart IMAP is an open-source Internet Message Access Protocol server with both IMAP4rev2 and IMAP4rev1 support.
Supports multiple IMAP4 extensions.
Stalwart SMTP is a modern SMTP server developed in Rust with a focus on security, speed, and extensive configurability.
Built-in DMARC, DKIM, SPF and ARC support.
Transport security through DANE and MTA-STS.
Configurable rules and Sieve scripting.
Frequently asked questions
If you have a question that is not listed here you may use the contact form below or write to us on Discord.
Contact Stalwart Labs
Have questions about any of our products? Use the form below and we'll get back to you as soon as possible.