I was quite impressed with Zimbra Desktop, it is really worth a try. The only reason I am not using it today is because I figured it would be a pain to migrate

I was quite impressed with Zimbra Desktop, it is really worth a try. The only reason I am not using it today is because I figured it would be a pain to migrate my current calendar, to-dos and address book to it, but Zimbra is the one I'd be using if I was starting from scratch today.