User can try DBX Repair Kit software which is capable of restoring every item from corrupt DBX files. Outlook Express stores mailbox data of its user in DBX file format. After the recovery you can save recovered file in* DBX or EML format.
Software Features:
1.Recovers all deleted, encrypted and compressed mails with attached files.
2.Supports all versions of Outlook Express.
3.Recovers email data even from password-protected Outlook Express .DBX files.
Try Demo Version- http://www.dbx.repair/
You could try restoring the Inbox.dbx file as a new file in Outlook Express:
Create a folder in Outlook Express and give it, a unique name, for example: Inbox01.
Click on the new folder: Inbox01 to open the folder, this will create the corresponding Inbox01.dbx file in the message store.
Verify the Read-only attribute is unchecked on the Inbox.dbx file you are restoring, then rename the Inbox.dbx file with the same name as the new folder you created in Outlook Express: Inbox01.dbx
Using Windows Explorer or My Computer navigate to the Outlook Express Message Store.
Close Outlook Express.
Copy the .dbx file that you renamed to Inbox01.dbx and paste it into the Outlook Express Message Store. You will be overwriting the new Inbox01.dbx file with your backup .dbx file.
Open Outlook Express and access the Inbox01 folder, the messages contained in the backup .dbx file should appear.
See how it works:- http://www.techrepublic.com/forums/questions/how-to-repair-a-corrupt-outlook-express-dbx-file/