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

Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to ...

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

hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, sch ...

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

The Mercury Mail Transport System is a mail server that sends and receives messages on behalf of a group of users on a machine ...

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the followin ...

Office 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or cloud-based use ...

MDaemon Messaging Server software for Windows can be deployed in virtual, hosted cloud or private on-premise environments. It ...

G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable ...

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

MailEnables mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows.

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

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

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

Zoho is an all-in-one online office suite. Zoho geares itself towards businesses, increasing your productivity and offering e ...