deleted email in Outlook

I use Outlook and deleted an email. Outlook is configured to empty Delete folder when closing. I needed the email i deleted and bought a program called RecoverAll Pro. I does a great job finding & recovering all deleted files. My question is: Has anyone had this problem recovering deleted email? What is the name of the file?? There were hundreds of files that RecoverAll found but i didn’t want to recover them all just to find one email! Does Outlook have a special extension to help identify emails?