The purchase of the iOS and Android e-mail app maker could signal that Microsoft is planning a native mobile email app for Outlook.
Microsoft's former No. 3 executive, Paul Maritz, is using some of the strategies developed at the software giant to turn VMware into a platform player. His toughest rival: Microsoft.
Zimbra is off to VMware for an undisclosed price, which is likely much less than the $350 million that Yahoo paid for the open-source e-mail company in 2007.
Virtualization specialist is building out its cloud-computing infrastructure strategy by buying Zimbra from Yahoo, making applications the new stakes for cloud competition.
Yahoo may not know what to do with Zimbra, but with 50 million paid mailboxes and counting, Zimbra clearly knows how to build a business.
If Microsoft and Google are best positioned to take advantage of the integrated cloud for business opportunity (aka "one-stop" cloud), who are challengers most able to take a leadership position?
Yahoo may be putting Zimbra up for sale, but it's not because Zimbra isn't delivering its side of the bargain.
A Web e-mail software company may not fit into a media-oriented Yahoo, and so Zimbra could be on the block just two years after being acquired.
Yahoo just lost a key executive from its Zimbra acquisition.
Zimbra has picked up another significant ISP, displaying its business savvy as it grows toward ubiquity.