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 us, and hope that it is important to you thereafter.
- - Kolab Community is the most popular Self-Hosted alternative to Microsoft Exchange Server.
- - Kolab Community is the most popular Open Source & free alternative to Microsoft Exchange Server.
Kolab Community Features
Opinions about Kolab Community as a Alternative to Microsoft Exchange Server
mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
mailcow: dockerized Features
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Opinions about Zimbra Collaboration Suite as a Alternative to Microsoft Exchange Server
SOGo is groupware server with a focus on scalability and open standards.
SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.
hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.Discontinued
hMail Server is no longer supported by the people who created it and has been discontinued – so use it at your own risk.
Opinions about hMail Server as a Alternative to Microsoft Exchange Server
The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.
OX App Suite Features
Opinions about OX App Suite as a Alternative to Microsoft Exchange Server
A fully fledged, free email server solution, an open source project (GPL v2).
Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.
Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.
Works on both no.
grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
Comments about grommunio as a Alternative to Microsoft Exchange Server
As the first open source solution to offer a full-featured OutlookAnywhere (RPC over HTTP) and MAPI/HTTP implementation, grammm is the alternative to proprietary backends for native interoperability with Microsoft Outlook1