I am evaluating Zimbra and MS Exchange solutions for our enterprise. I am pretty much aware of what each has on offer and then i went to the pricing aspects.

Although Zimbra has a seemingly low license cost of 28$/User/Year, due to the recurring license (in contrast to a perpetual licenses in case of Exchange world) it looks like it turns out more expensive in the long run - as also suggested in a review if found on the web.

http://i.i.com.com/cnwk.1d/i/tr/down...455_review.pdf

Any inputs on this?