Prevention and Clean-Up Tips for Duplicate Emails in Outlook

It is not a serious problem, but it can be quite annoying in your daily life when working with Outlook. Keeping an overview and identifying important messages is especially important when receiving a large number of emails professionally. As a result, having duplicate emails in your inbox can cause problems in your daily work routine. These simple tips and strategies for preventing and cleaning up duplicate emails can help you be more efficient and organized in your Outlook mailbox. As a result, it may be of interest to learn about the causes of duplicate emails, which are discussed in this article.


Did you know that you can use the desktop search solution Lookeen for free?

How to stop the receiving of duplicate emails


  • One of the few things you can do to stop the receiving of duplicate emails is to check the Rules configurations to ensure that copies are not made to your Inbox. Thereby, make sure that all your rules end in “Stop Processing” actions.


  • Check the task manager and ensure that there is only one instance of Outlook running. Two instances running at the same time can lead to two duplicated messages arriving. As such, you may need to determine why two instances were running.


  • Another option would be to delete ALL your Outlook email accounts and recreate them.


  • If you use two email addresses with the same POP3 incoming and SMTP outgoing, this can lead to duplicate emails. Therefore, you must disable the receive on the second account.


Method 1: Avoid having numerous accounts in Outlook

Step 1: Open your Microsoft Outlook and click the file tab. Then select Info>Account Settings.

Step 2: In the Account Settings window, click on the email tab to search for the configured account name.

Step 3: In case it appears more than once, remove it. Therefore, you have to select the according mail account and press the Remove button.


Step 4: Finally, press the Close button. Your duplicate account should then be completely removed from your Outlook.


Can’t find emails in your Outlook? Try the desktop search solution Lookeen for free!

Method 2: Remove Duplicate Emails via the Import/Export Option

 Step 1: Open Microsoft Outlook and click the file tab


Step 2: Click Open/Export and then Import/Export

Step 3: The import and Export Pop Up Window should show up. Select Import from another program or file and then click the next button.

Step 4: Now, choose Outlook Data File (.pst) in Import a file and press the next button.

Step 5: Select PST and next.


Step 6: Browse the data file and select the option do not import duplicates. Click Next.

Step 7: Finally, choose Outlook Data Files to export all data and click the finish tab.


Do you use Outlook? Give Lookeen a try!

Method 3: Outlook Clean Up Tool

The built-in Microsoft Outlook Clean Up Tool may also be an option to remove duplicate files, emails, folders, or messages from Outlook.


Step 1: Open your Microsoft Outlook. You’ll find the Clean Up tool on the ribbon bar. Place a tab on it and then select all the options.


Step 2: You will then find three options: Clean up folders, Clean up folders and subfolders, Clean up the conversation. Select Clean up folders and subfolders and click Yes to confirm.


Step 3: You can now provide the location of deleted folder items manually. Click on Settings,and a new window will appear.


Step 4: Select Browse and the Select Folder Window will appear.


Step 5: Choose Deleted Items and click Ok.


Step 6: In this final step, click on the Clean up folder Option to delete duplicated emails from your Outlook mailbox.

Did one of the methods above help you to fix your issue with duplicated emails? Or do you know another strategy which might be helpful? Let us know in the comment section!


See you soon!

Aline & the Lookeen team

Share with:


Leave a Reply

Your email address will not be published. Required fields are marked *

Popular Posts:

Lookeen Newsletter

Subscribe to the Lookeen newsletter to get the latest updates and content first.