I have a couple mailboxes that appear to have a discrepancy between the reported mailbox size, such as from "zmmailbox gms" and the actual size of the mail that I can see from the web client.

In one case, zmmailbox reports a whopping 3.48G. I've manually searched for large attachments and mouse-over'd all the folders to check their size and I can't account for more than 1.9G in that mailbox.

Any ideas about the 1.5G difference?