I miss Zimbra

Exchange is overly complicated. It's a system designed by committee. It's not that bad, and it has tons of great features, and when it works it's amazing. But when it goes wrong, it goes very VERY wrong.

I miss Zimbra and it's ability to run from a single box and support hundreds of users with zero issue.

If it hadn't been for the crazy timezone issues that were affecting every major calendaring system at the time, we probably would have stayed with it.

I'd definitely use Zimbra again though, and encourage anyone setting up a new startup to give it a shot.