Stalwart is described as 'Open-core mail server solution with JMAP, IMAP4, POP3, and SMTP support and a wide range of modern features. It is written in Rust and designed to be secure, fast, robust and scalable' and is a Mail Server in the office & productivity category. There are six alternatives to Stalwart for Self-Hosted, Linux, Mac, Roundcube and Docker. The best Stalwart alternative is mailcow: dockerized, which is both free and Open Source. Other great apps like Stalwart are Postfix, Mail-in-a-box, Mailu and WildDuck.
mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
mailcow: dockerized is the most popular Linux & Self-Hosted alternative to Stalwart.
mailcow: dockerized is the most popular Open Source & free alternative to Stalwart.
Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by its former names VMailer and IBM Secure Mailer.
Postfix is the most popular Mac alternative to Stalwart.
Mailu is a simple yet full-featured mail server as a set of Docker images. It is free software (both as in free beer and as in free speech), open to suggestions and external contributions.
WildDuck is a scalable no-SPOF IMAP/POP3 mail server. WildDuck uses a distributed database (sharded + replicated MongoDB) as a backend for storing all data, including emails.
Mox is a modern full-featured open source secure mail server for low-maintenance self-hosted email.
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