The Zimbra team is proud to announce that Zimbra Collaboration 8.5 is now available. Our tagline is “Anytime, Anywhere, Any Device,” because it’s built on an open platform, including support for the broadest range of mobile, browser and desktop clients available in the market today. Read all about it in this blog post from our CTO Rob Howard: Zimbra Collaboration 8.5: Anytime, Anywhere, Any Device :: Zimbra :: Blog
Please note that it is the first version released under OSI-approved licenses, GNU Public License version 2 for the server platform and the Common Public Attribution License version 1 for the web application.
Zimbra Documentation: https://www.zimbra.com/documentation/