Hello. I opened my Apple Mail icon a couple hours ago and everything seemed fine as I recall. I shut down my Mac and started it up again maybe 45 minutes ago. All my email history had completely vanished and it was instructing me to set up my mail. I got my verizon account info (haven't done my old comcast info yet), and I just received an one incoming message, but all my email history has vanished ( I have no backup, my fault I know). Could anyone advise me what has happened, and if it is possible to restore my history? Thank you for your help. Regards, kayakjack