How to Remove Duplicate Emails from Outlook 2021, 2019, 2016?

Approved By Rollins Duke

Published On December 5th, 2023

Reading Time 7 Minutes Reading

Do you want to remove duplicate emails from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 98, and 97? If your response is yes then landed on the correct webpage. In this blog post, we will discuss multiple possible ways to delete duplicate emails from Outlook and exported PST files.

There are various drawbacks available if your Microsoft Outlook profile has duplicate items. So, users, don’t prefer to keep and store duplicates in an Outlook account. For professional users, emails are most crucial because of official communication needs. Administrators want to manage Outlook PST files by eliminating duplicate items to get the best performance.

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The Inevitability to Delete Duplicate Emails from Outlook

If duplicate items are available in your Outlook profile, it affects Outlook’s performance.
Your Outlook data files (PST) may be got corrupted due to oversize and you may lose your crucial email data.
Microsoft Outlook email client may be crashed due to harmful duplicate emails and may it cannot be restarted again.
If you search for a particular email in Outlook then you may receive multiple duplicate outputs that create confusion.

Know Reasons Behind Outlook Duplicates

Human Mistakes: Sometimes humans send the same emails twice or multiple times. Even sometimes users may save the same contacts and calendar entries at various times.
Slow Internet: Due to slow internet, sometimes the server does not know that you have received the message because it may delay receipt confirmation. Then it may send and receive duplicate emails.
Incorrect Outlook Rules: Sometimes users might be configured wrong rules by mistake which may become the reason for Outlook duplicates.
Select Allow Duplicates Option: While importing PST files in Outlook, users may select the “allow duplicates to be created” option.
Unwanted Duplicates: Hackers or unwanted users may target your server for email bombing by continuously sending duplicate emails.
Account Settings: Many times, users configure the same email account twice or more. After that, Outlook starts downloading duplicate emails multiple times.

Techniques to Remove Duplicate Items from Outlook

Several best methods are available to remove duplicate emails from Outlook PST file. You can use them accordingly to remove duplicate emails from Outlook folders i.e., Inbox, Drafts, Sent, All Mail, Spam, Trash, and all.

#1 Method: Use Outlook Duplicate Remover Software

Download Mailsware Outlook Duplicate Remover setup on your computer and install it. This software comes with a free demo version which is capable to process the first 25 items from each Outlook folder for deleting duplicate emails from Outlook. The tool supports Outlook PST or OST files and fixes all duplicate emails, contacts, calendars, tasks, notes, journals, and all.

How to Delete Duplicate Emails from Outlook?

Start Outlook Duplicate Remover on your machine and read the instructions to remove duplicate emails from Outlook folder.
The tool provides automatic and manual options for adding Microsoft Outlook profile data.
Now you can see Outlook folders in the software panel, choose the required folders and press the Next button.
Afterward, choose a mode to search duplicates within and across the folders.
Use advance settings to remove duplicate emails from Outlook PST file by date, email address, email subject, etc.
Thereafter, set the destination path to store processed Outlook PST files using the Browse button.
Click on Extract to begin the process to remove duplicate items from Outlook.
Now see the message of completion, Outlook duplicates were removed successfully.
At last, the software will open the destination path so that you can easily get the resultant PST files.

Benefits of Software

Remove duplicate emails from Outlook PST (Personal Storage Table) and OST (Offline Storage Table) files without any error.
Advance filter options are available to delete duplicate emails from Outlook by date range, email address, email subject, etc.
Option to set the preferred size 2 GB, 5 GB, 10 GB, and 20 GB for resultant PST files after erasing the duplicates.
The tool is capable to remove duplicate emails from corrupted PST files and fix them forever.
The software allow users to remove duplicate attachments from Outlook all editions.
Remove duplicate emails from Outlook within and across the folders according to the choice of users.
Delete duplicate items from Outlook PST file such as emails, contacts, calendars, tasks, notes, journals, etc.

#2 Method: Remove Duplicate from Outlook Folder Using Import/Export

Start the Microsoft Outlook email client and choose the Open & Export >> Import/ Export option.
Choose Import from another program or file option shown in the screenshot and press Next.
Select Outlook Data File (.pst) option and click on Next.
Click on the Browse button and choose PST file from your computer from which you want to remove duplicates.
Select the Do not import duplicates option and click on Next to continue.
Choose configured Outlook account and press Finish to start removing duplicates.

#3 Method: Remove Duplicate Configured Accounts

This might be also possible while configuring Outlook accounts. Sometimes, if users face issues with configured accounts, then they may configure the same account again. Even sometimes, users may import duplicate PST files in Outlook. Hence, once check the account settings and be ensured.

Start your Microsoft Outlook and choose the Info >> Account Settings option.
Again, select Account Settings option from the drop-down to add or remove accounts.
Choose a duplicate Outlook account and press the Remove button.

#4 Method: Delete Duplicate Items from Outlook via Clean-Up Tool

Run Microsoft Outlook and choose a folder that has duplicates.
Choose the Home >> Clean Up option from Microsoft Outlook.
Select an option according to need from Clean Up Conversation, Clean Up Folder, and Clean Up Folder & Subfolders.
All redundant messages in the current folder and its subfolders will be moved to the “Trash” folder. Choose the Clean Up Folder option.
At last, open the Trash folder and delete redundant emails permanently.

Drawbacks of Manual Techniques

There is no guarantee, if you lose your crucial email messages while removing duplicate emails from Outlook PST file.
Sometimes Clean Up Tool shows an error message i.e. “No messages were cleaned up. Only messages that satisfy your clean up settings will be moved to the trash folder.”
Clean Up folder only allows to clean redundant emails only from single selected folder. Hence, you will need to repeat same process again and again.
There is no filtration option available to delete duplicate emails from Outlook accordingly.
The manual method does not permit to remove duplicate items from Outlook across the folders.

Frequently Asked Questions

Que 1: Can I remove duplicate emails from Outlook 2021?

Ans: Yes, the tool is compatible to remove duplicate items from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 98, and 97.

Que 2: How to remove duplicate emails from Outlook inbox?

Ans: We have discussed the top 4 methods to delete duplicate emails from Outlook inbox. Go with any preferred technique according to your situation.

Que 3: Does your tool allow to the removal of all duplicate items from Outlook?

Ans: Yes, this application is authorized to remove duplicate items from Outlook such as Emails, Contacts, Calendars, Tasks, Notes, Journals, etc.

Conclusion

Above we have explained 4 different techniques to remove duplicate emails from Outlook PST file. Use any one method according to your dependence to delete duplicate emails from Outlook profile. However, we advise to use professional and guaranteed solution for completing this task. Because we know the value of your data so this is not advisable to take any risk while removing duplicate items from Outlook using manual approaches.