From Stellar Information Technology:
Stellar Phoenix Outlook Duplicate Remover is fast and easy software to remove duplicate e-mails from MS Outlook mailbox and thus makes your Outlook faster and light. The software removes duplicate e-mails from Outlook in a way that it significantly reduces the size of Outlook PST file and hence minimizes the chances of PST file corruption due to oversize. The software efficiently locates and removes duplicate e-mails and supports Microsoft Outlook 2016, 2013, 2010, 2007, and 2003. This efficient utility also facilitates you to perform various personalized actions on duplicate e-mails each time you scan for them. Some of the personalized actions available for the software are deleting, copy to folder, Mark with flag, Delete permanently, Mark as expired, and Move to folder. If you want, you can select multiple mailboxes to remove duplicate e-mails from Outlook application. Moreover, this software has very interactive and easily understandable user interface and provides a wide range of scan criteria to find out duplicate e-mails.