Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative we ...

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsof ...

Axigen is a premium, all-in-one email, calendaring and collaboration platform, based on an innovative, proprietary technology, ...

OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols. Exchange ...

Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage ...

DeskNow by >Ventia Pty Limited, Australia integrates in a single, easy to administer product: fully featured mail server ...

OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for ...

Afterlogic Aurora is an enterprise collaboration system for small and medium-sized business. Aurora provides collaboration of ...

iMail - Business and School Ultimate Free Mail Solution Web-client access, LAN or WAN self-hosted server, maintenance-free des ...

Sanwhole Exchange is a server running iMail, iPress and iStore services.

iMail is an enterprise-class email server does Micros ...

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

Use official binary packages from Linux/BSD dist ...

SophiMail is a fully-featured email and collaboration server, ideal for private hosting: on cloud, on premises or hybrid.

Solv ...

Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaborat ...

Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BS ...

Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMT ...