I am using Tiger and Mail. I sent two messages which came get from my ISP (Sympatico) Mail Delivery System with the header "Delivery Status Notification Failure". There is no body to the message. I can get rid of these 2 messages. I have tried everything. When I delete them, they reappear in my in-box either after I switch mailboxes and return to inbox or after I restart mail. I have tried putting them in the trash and emptying the trash. I have tried deleting them from the trash inbox. No luck. Any suggestions?