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DBX Open File Tool or try to use steps below...
Please find here a step-by-step guide to repairing a corrupt inbox or outbox.
Remember: When you repair Outlook Express folders, all the original folder content is lost.
Follow the instructions below:
Shut down Outlook Express
Click [Start]
Select Find
Select Files or Folders
Enter the name of the corrupt folder. For example, inbox.dbx
Click [Search]
When search has found the folder, right-click on it and select rename
Call it inbox.old (where inbox is the original folder name)
When you restart Outlook Express, a new folder will be created. You will need to repeat the above steps for each folder that is corrupted. The folders used by Outlook Express are called:
inbox.dbx
outbox.dbx
sent*items.dbx
deleted*items.dbx
drafts.dbx.