at wit’s end with apple mail
For some reason, when I upgraded to Leopard, Mail did something weird. Sometimes I can’t delete messages. They’re just greyed out. Then again, sometimes I can delete messages even in the same accounts where others won’t delete. The ones that won’t delete are behaving as if I’d not checked the option in Mailbox Behavior to move messages to Trash, but I DID. I’ve checked and re-checked, but I’ve done everything I was supposed to do. One common thread seems to be that I can erase single messages but not those in threads. Also, there are several accounts where this happens, including Yahoo and my Road Runner accounts. This hasn’t happened—yet—in my Google Mail or MobileMe accounts. I don’t know what to do. HELP!!!
Had this problem myself, with deleted messages even reappearing later. Solution was to rebuild the mailbox (menu command), then ensure that ‘Hide deleted messages’ was selected.