Yesterday VMware made an announcement regarding the upcoming release on Zimbra, bringing the current version onto 8.0. The current beta number is version 5. This release is available as an appliance or as an iso for a full install. This major version got a design revamp and some new stuff under the hood. End Users
Zimbra 8 has been annouced - ESX Virtualization
Beta Testing Open! - Zimbra 8.8 - Zimbra : Blog
Zimbra Email & Collaboration by Synacor
Zimbra 8 has been annouced - ESX Virtualization
What's New? Zimbra Collaboration 8.8! - Zimbra : Blog
How to install Zimbra Mail server 8.8.8 on Cent OS 7 - Tutorials and How To - CloudCone
Now Yahoo's, Zimbra takes mail and documents offline - CNET
Zimbra OS Release Notes 8.0.0
How to Install Zimbra Collaboration Suite 8.8 on Ubuntu
Zimbra – Vavai's Personal Notes
Zimbra Server Zimbrateam's Blog