By this way you'll get rid of all those e-mails you don't need and you will not waste your time.
You can set it to perform actions automatically or to ask you what to do ifany duplicate e-mail is found.
Duplicate Killer is compatible with Microsoft Outlook 2007, Outlook 2003, Outlook 2002, and Outlook 2000. In addition it is compatible with Windows 7 and Microsoft Exchange Server. In short, if you use Microsoft Outlook, you can use it and it can be very useful.
14-day trial version.