The other day Mail.app went crazy and kept crashing. When it came back up, it wouldn't display any of the mail in my folders. I rebuilt all of the folders. This worked, but for some reason it date-stamped a load of my sent mails with the current date and time. My account is with .Mac -- and when I log in to my webmail, all the dates on those particular messages are original and correct. So the actual messages on the IMAP server are ok. Any idea how to fix this inside Mail.app? Thanks in advance for help.