I read in the main FAQ that when you close down the Zimbra GUI it's still running in the background. However, as far as I can make it, on my machine that's not happening. I'm running Mac OS X 10.5.6 and can't see anything obvious running in the background when I looked at Activity Monitor. I also don't receive any notification about new emails.
Is there a problem with my installation? If so, how do I resolve it?