iRedMail Alternatives

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.

An open source mailserver suite.

Open Source

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

Try for free freemium $9.0 / Monthly

Web-based IMAP email client

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

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

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

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

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

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

SOGo is groupware server with a focus on scalability and open standards.

Open Source

Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.

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

freemium €5.0 / Monthly (user - 5 GB)

Horde Groupware is a free, enterprise ready, browser based collaboration suite.