Zimbra Collaboration Server 8.0 General Availability
Introducing Zimbra 8 » Zimbra Blog
Too many enhancements to list here, so read the blog, scrutinize the release notes, browse product management portal, and install it in a virtual machine or fire up the easy to use appliance.
ZCS 8.0: Network Edition Downloads & Release Notes | Open Source Edition Downloads & Release Notes | Appliance Edition Downloads & Release Notes
The community's thanks to the developers and quality engineers who worked hard to make this branch stable, and of course to everyone who tested builds along the way: Your feedback proves invaluable.
Play around, run a upgrade on a separate environment, test, go over your checklist, communicate the upcoming changes, backup and deploy!
We hope you enjoy the 8.0 series!