Mail Password Recovery
Mail Password Recovery is a Free Portable email password recovery tool. It allows you to recover email passwords for any POP3 account, as long as it is stored in an email program. I've personally used the tool to recover lost e-mail account passwords in Outlook Express and Windows Mail. Simply change your pop3 server to 127.0.0.1 for the email account you wish to retrieve the password for, then send and receive e-mail. Mail Password Recovery will record and display the password your account is trying to use to fetch e-mail.
Mail Password Recovery Screenshot
Authors Website: http://gsmblog.com/page/Mail-Password-Recovery.aspx
Download: You can get this e-mail password recovery tool HERE