Maybe someone can advise. When I download my messages from the server, Mac mail does not remove the copy from the server despite the fact in mail Peferences I have checked the box "remove copy from server after retrieving the message". The reason I know this is because I can go on my old PC laptop and download the same messages all over again from the server. So although those messages may no longer be available to my mac mini, they are still available to a PC. What gives?