You Receive Duplicate Messages When You Download E-Mail from the Server in Outlook Express

Cause:

'Leave messages on server? is checked in account settings of Outlook Express. This behavior can occur if the Pop3uidl.dbx file is damaged.

Solution:

SUMMARY To resolve this behavior, rename the Pop3uidl.dbx file, and then restart Outlook Express. Follow these steps: Close Outlook Express. Click Start-> Search and then click For Files or Folders. In the Search for files or folders named box, type Pop3uidl.dbx, and then click Search Now. Under Search Results, right-click the Pop3uidl.dbx file, and then click Rename. Type Pop3uidl.old, and then press ENTER. Restart Outlook Express