E-Recovery is a tool designed to undelete and recover accidentally
deleted e-mail messages and repair damaged dbx files. Outlook Express
stores each folder in Outlook Express in a dbx file, which is
identical to the folder name. Our new Intella Recovery technology
allows e-Recovery users to quickly reconstruct damaged dbx files
created by Outlook Express and easily restore the lost or deleted
email messages. The Deleted Items folder is the Outlook Express
equivalent of Windows Recycle Bin. When you empty the Deleted Items
folder messages are gone forever. Not so for e-Recovery users.
e-Recovery will scan your Deleted Items folder and display all of the
lost email messages still residing on your computer. The messages are
recovered in the .eml format to a folder of your choice and can be
imported or dragged and dropped into Outlook Express mail and news
bases

For more information:
http://www.dtidata.com/products_erecovery.asp