Microsoft Exchange Server 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.

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

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

Try for free freemium $9.0 / Monthly

Web-based IMAP email client

An open source mailserver suite.

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

9 hours ago - It does include a proprietary software set optimized for business users, students, researchers and developers." A list of features and further details can be found in the company's release announcement.

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

Modernisieren Sie Ihre Infrastruktur mit SUSE Linux Enterprise Server, OpenStack Cloud-Technologie für IAAS und softwaredefiniertem Storage von SUSE.

DeLicate Linux is a free and lightweight Linux Kernel-based operating system that is intended for computers comprising of very Low RAM.

Fuduntu is an open-source appropriation of Linux, a remix of the Fedora working framework, which thusly depends on the honor winning Red Hat Enterprise Linux OS.

Xubuntu – Xubuntu is an elegant and easy-to-use operating system. Download XubuntuXubuntu – Xubuntu is an elegant and easy-to-use operating system. Feature Tour.

Haiku is an open source OS catered specifically to the needs of personal computing.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.