How to stop receiving duplicate emails from POP3 server in Outlook

Receiving redundant emails in Outlook is one the prime concern for Outlook users due to its size implications. In case you are working with a POP3 account then there are possibilities that you could get duplicate emails. Receiving same emails multiple times unnecessarily increases the size of Outlook data file. Also it creates problem in your Outlook application and takes the valuable space. Increased size of Outlook .pst file can cause several performance issues in Outlook and also can lead to the corruption of .pst file. So it is necessary to identify the cause of occurrence of duplicate emails and appropriate method to remove them.

Let’s consider a scenario, where you are working with Outlook with POP3 server and receiving duplicate emails. Then it is pretty obvious that presence of same emails will hamper your Outlook working. You must want to know is there any way to avoid downloading of duplicate emails and also how to remove duplicate emails from your mailbox. Before going to get a solution, it is necessary to understand why you are receiving duplicate Outlook emails.

The possible reason of this problem is : Use of option “Leave a copy of messages on the server”To avoid receiving duplicate messages, follow the below mentioned steps :


  1. Open Outlook and go to Tools → Email Accounts → View or Change Existing Email Accounts and click next.
  2. Select your email account and click Change → click on More Settings → Advanced .
  3. Unmark or disable the ‘Leave a copy of messages on the server‘ option and click OK .

Through this setting, you can stop receiving duplicate emails from POP3 server in your Outlook. However, depending on other situation you still could get duplicate emails due to other reasons like rule creation, multiple accounts, virus scanner or firewall etc. Further, to make your Outlook clean from duplicate items, other reliable Outlook Duplicate Remover could be used effectively.

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