Stalwart Mail Server (Apache83)

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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.
Scales to millions of users thanks to FoundationDB.
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.

  • Rock solid.
  • 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.

  • IMAP4rev2+1 compliant.
  • Supports multiple IMAP4 extensions.
  • Standards Compliant.

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.


on first start set up an ‘admin” password stored in /opt/StalWartMail/password_startup.log
on first install you will get a pop on QTS (top left I Button) with the password as well
config file is stored in /opt/StalWartMail/etc/config.toml (generated on first start)
include in NAS $PATH commands : stalwart-cli and stalwart-mail

Your gratitude and finance will help me to continue integration of this QPKG and maintain up-to-date versions.

official website




Apache83 –



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