One of my client's email is acting very strange. She receives some messages, but certain messages you can watch it hit the inbox then disappear. I can not find the message in the trash can or other folders. An example of a message that disappears is Undeliverable daemon sent by the system administrator. As I said it hits the inbox and 1/2 second later vanishes. I am not sure in where it goes, but it disappears. I am stumped on this problem. She does not have filters set up. Also it's not just one user either. It's the whole office. Any suggestions, comments, experiences? Thanks