I've owned my Mac Mini for about two months. Last night I started getting a flurry of auto-generated emails from my ISP first saying my mailbox was near full, then messages saying that incoming mails were being bounced because my mail box was full. Huh? I contacted my ISP and they had me log into my WebMail account and sure enough, the mail server was full of emails...every email sent and received...since switching over from Windoze to Mac. The tech had me go into the preferences/accounts/advanced tabs in Mac Mail and sure enough, there's a little check box that enables "Save copy in server". After disabling that feature I then went back into WebMail and cleared out all the old stuff. Peace has returned. I can see the usefulness of such a feature, though. If you ever accidentally deleted an email in Mac Mail you can go back to the server and retrieve it. Then again, you have to go to your ISP's mail server (WebMail) and periodically clean it out. You learn something new every day.