*** Improved by Wrobinson on 01/02/08 ***
Try using the following: Microsoft Exchange Server Information Store Viewer.
*** End Update ***
You can try exporting the folder that has the corrupted email in it to a Personal Folder. Then try to delete the email. Or run the scanpst.exe (in the \program files\microsoft office\office10 folder) on the .pst file…then, reimport the .pst file back to the Exchange mailbox.