Mailcow

GPL-3.0 self-hosted Web

Alternative to: Alternatives to Gmail

Mailcow is an open source mail server suite licensed under GPL-3.0. It is based on Dovecot, Postfix, and other software that provide the underlying mail server technologies. A modern web user interface serves as its administration interface, allowing administrators to manage the Mailcow environment while the individual components operate beneath it. The suite brings these technologies together rather than presenting them as separate systems to administer independently. Mailcow is intended for administrators who want to run and manage an email server environment through a web interface. It can be used as an open source replacement for Gmail. One important difference is that Mailcow is a server suite built on Dovecot, Postfix, and additional software, with a web interface focused on administration. The available information does not establish that it reproduces Gmail feature for feature, so it should not be assumed to provide every function or the same user experience.

Key features

Install

What's new in v2026-10

## What's Changed ### Security * [PHP] Update base to Alpine 3.24, build PECL extensions from GitHub by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7534 * [SOGo] Update to 5.12.12 by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7536 * [Nginx] Update to 1.30.6 by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7535 ### Features * Feat/update UI by @…

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