"There's no shortage of messaging and collaboration suites trying to unseat Microsoft Exchange, but many of the suites are still playing catch-up with Microsoft in terms of features. Zimbra, on the other hand, seems to be on par with Exchange in many ways--and ahead of Exchange for hosting providers and in collaboration features.
"I talked with Scott Dietzen, president and CTO of Zimbra, about the suite and what it has to offer. Zimbra's features go beyond the traditional messaging components of email, calendaring, and contact management. The 4.0 release of Zimbra includes VoIP and mobile synchronization features you won't find in Microsoft Exchange, and document collaboration features that put Zimbra on a par with Microsoft SharePoint..."
