Is it possible to construct a rule / filter / VB script or some other way to remove duplicate emails from my mailbox. I have yahoo mail. Sometimes Outlook downloads the same mail messages two or more times. I don't want to have to go through all my mail and manually delete duplicates, is there an automatic way in Outlook 2000 or Outlook XP. Also is there a way I can merge several mail pst files so that duplicates are not copied.