Over the years, many of Microsoft monopolies have been successfully attacked by open source: Linux on the server; Apache for Web servers; Firefox for Web browsers; and so on. The one exception, and it’s a big one, is business e-mail. Exchange, with 65% of the market owns business groupware and e-mail. Things are about to change.
Cisco is buying PostPath, and that is going to kick Exchange in the head. You see, is an open-source based server program that doesn’t just do e-mail and groupware, it actually has reverse-engineered Microsoft Exchange’s protocols. Result: To someone sitting at a desk looking at your copy of Outlook, you won’t be able to tell the difference.