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Quickly delete or remove duplicate emails in Outlook

When you want to delete all duplicate emails at once, Outlook can’t give you any help. You need to manually delete them one by one or try to find a useful add-ins to help you get it done. Kutools for Outlook is a useful Outlook add-in for enhancing your Outlook work efficiency. With Kutools for Outlook’s Delete Duplicate Mails utility, duplicate emails won’t be any problem. You can quickly delete them all at once.

Quickly delete or remove duplicate emails in Outlook

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arrow blue right bubble Quickly delete or remove duplicate emails in Outlook

You can quickly delete all duplicate emails in Outlook by follows.

Kutools for Outlook: With more than 20 handy Outlook add-ins, free to try with no limitation in 45 days. Read More      Free Trial Now

1. Go to a folder in one of your account that you want to delete duplicate emails from.

2. Please apply this utility by clicking Kutools > Duplicate Mails. See screenshot:

3. Then a Duplicate Mails dialog box pops up, you can see all the duplicate mails are listed in the dialog box with the detailed information of their Subject, Date and Attachment.

3.1. By default, for example, if there are five duplicate emails all with the same subject name of “Test” in your selected folder, four duplicates will be selected automatically for removing, and the unchecked one will be kept in the inbox.

3.2. Click Inverse button to inverse selecting the emails; click Check All button to select all emails. Or you can manually select the emails for your own needs.

4. Please click Delete button to remove the duplicate emails you selected.

5. After clicking Delete button, there will be a dialog box popping up to tell you how many duplicate email have been deleted. Please click OK button, and the Duplicate Mails dialog box will be closed automatically.

Note: This Delete Duplicate Mails utility delete duplicate mails with same subject, body and attachments from the folder you selected, and just keep one.

arrow blue right bubbleDemo: Delete all duplicate emails from a mail folder by Kutools for Outlook


Tip: In this Video, Kutools tab is added by Kutools for Outlook. If you need it, please click here to have a 60-day free trial without limitation!

arrow blue right bubble 20+ Powerful Tools and Features for Outlook 2010 / 2013 / 2016 / Office 365:

li-orangeCompatible with Outlook 2010 / 2013 / 2016 / Office 365 (32/64);

li-orangeCompatible with Windows XP, Windows Vista, Windows 7 / 8 / 10, Windows Server 2003/2008, Citrix System and Windows Terminal (Remote Desktop) Server;

li-orangeFree trial without feature limitation in 45 days!


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