So far this looks really good. I did have to enable imap and pop manually as pointed out by Tim. Easy fix though.
One thing I haven't been able to make work properly is imapsync. It keeps throwing a "NO APPEND" error which is confusing me.
Other than that, the implementation is great and the webapp is very slick. I haven't used Zarafa before now but I certainly feel like I've been missing out. Can't wait for the final release!