Another Outlook Duplicate Emails Remover is a powerful utility to scan select mailboxes to remove all the duplicate files, as per the specified criteria. The tool can scan the whole mailbox, such as Sent Items, Inbox, Deleted Items and Outbox. It removes all multiple and Duplicate email copies.It dramatically removes the overall size of PST files and helps users avoid corruption issues in Outlook PST files by preventing it to exceed the size limit.

For more details at - http://www.mannatsoftware.com/stellar-phoenix-outlook-duplicate-remover.html