It’s sorta like checkdisk for your email.
punch the Start button to start the scan… press the Repair button, and after a while you’ll finally get the “Repair complete” message.
If you’ve created a new personal folders file, it might be in a different location.
On the properties screen, tap the Advanced button.
Now you’ll see the location of the file in the Filename field.
Of course… you should be backing up your files as well.