I've noticed with Zimbra (5.0.4) that if I send email to a user, and also a distribution list that contains that same user, then that user will receive two copies of the email. This is somewhat different from the behavior of most email servers. Is this the expected result and is there any way to change it?
Additional note: if you send mail to a user, and also CC mail to that same user, it works as expected, they only get one copy. So I guess it's not broken in general, but just for distribution lists.