Mail-in-a-box Alternatives

An open source mailserver suite.

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

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.

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)

Web-based IMAP email client

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

The Power Email App for busy professionals, like you.

Mailbird is the best email client for Windows 7, 8 and 10

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

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

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

freemium $1.0 / Monthly (per user)

Full featured email server built in docker with free plan.

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