mailcow Alternatives

A fully fledged, free email server solution, an open source project (GPL v2).

Open Source

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Open Source

Warm up your cold email inbox, and never land in spam anymore!

Try for free freemium $9.0 / Monthly

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

Web-based IMAP email client

Open Source

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface.

Mailu is a simple yet full-featured mail server as a set of Docker images.

hMailServer is a free e-mail server for Microsoft Windows.

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

Full featured email server built in docker with free plan.

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

FOSS Private Digital Workplace Email and Collaboration Platform

Open Source free

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases.

Self hosted modern mail server

Open Source