How to Remove Duplicate Emails from PST File? 5 Methods
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Removing duplicate emails from PST file refers to finding and deleting the unnecessary copies from Outlook Data File. Duplicate emails are created due to repeated account configuration, import activities, improperly configured Outlook rules, sync errors, or other email-related issues. It helps to minimize storage usage, improve search efficiency and maintain more organized Outlook mailbox.
In this article, we know different ways to delete duplicate emails from PST file, including manual process, Outlook’s built-in Import/Export, remove configured duplicate accounts, Clean Up options and an automated Outlook Duplicate Remover for advanced filtering and duplicate removal within or across folders with no data loss.
Quick Way to Remove Duplicate Emails from PST File
Users looking for quick and reliable solution can use BitRecover Outlook Duplicate Remover. This tool gives flexibility to safely remove duplicate emails from PST as per your need by providing advanced filters, bulk processing and support language option. It’s separate option allows you to set the size for processed PST files like 2 GB, 5 GB, 10 GB, and 20 GB. Using this tool you will easily perform several filtered duplicate removal tasks as mentioned below.
- Remove duplicate contacts in Outlook PST
- Delete duplicate calendar items in Outlook PST
- Remove Duplicate Tasks in Outlook PST
- Delete duplicate notes from Outlook PST
Click on below buttons to download the recommended tool on computer.
Now check out the listed steps below to remove duplicate email in Outlook PST file, using an automatic solution.
How to Delete Duplicate Emails in PST File?
- Open the tool on Windows Operating System and click Next.
- Add PST files in the software GUI using manual and configured Outlook options accordingly.
- Select email folders from preview panel where your duplicated emails are stored.
- Choose a preferred mode to find duplicate emails within or across folders, to delete duplicate emails.
- Use advance filters to remove duplicate emails from PST file by date, email id, and email subject.
- Afterward, click on Browse icon & set “Destination Path” to store processed PST files.
- Click on “Extract” button to remove duplicate emails in Outlook PST file.
- Finally, tool automatically open selected “Destination Path” after completion, which makes easy.
Benefits of Using Automated Solution
- Using this tool, users can delete duplicate contacts, tasks, calendars, emails, notes, & journal entries from their Outlook data files.
- This tool allows user to choose specific folders where their duplicate emails were stored.
- Tool support with all versions of Outlook & their files, such as PST, OST, & NST, including both ANSI & Unicode formats.
- Using this utility, users will remove duplicate data within one & across folders, without corruption.
Manual Methods to Remove Duplicate Emails in Outlook PST File
Microsoft Outlook also provides some alternative options to remove duplicate emails from pst file. Here, we are discussing all alternative options which can be helpful in such cases but there is no guarantee for a success rate. You can click on any alternative method and scroll down.
1)Steps to Identify and Remove Duplicate Emails in PST Files Manually
If users have few PST files, then they can manually check for duplicate messages and remove them. following are the steps provided below.
- Open Outlook and go to the folder holding the duplicate emails.
- Organize messages by Subject, sender or Date to locate duplicate messages.
- Review each email carefully and delete duplicate messages individually.
- Permanently delete the duplicate messages, clear the content of the “Deleted Items” folder
2) Import/ Export Option to Delete Duplicate Emails from PST
- Run MS Outlook client and select Open & Export > Import/ Export option.
- Select Import from another program or file option and press the Next button.
- Choose Outlook Data File (.pst) option and click on Next.
- Press the Browse button and choose a PST file from your PC that has duplicate emails.
- Check the Do not import duplicates option and hit on Next to continue.
- Select the Finish button to start importing emails with removing duplicates.
Note: Once your PST file is imported into Outlook without duplicates, then export it from Outlook if you want to reuse it somewhere else.
3) Check & Remove Configured Duplicate Accounts
Sometimes if Outlook stopped working due to the account settings, then users again set up a previously used email account with Outlook. That becomes the cause for PST duplicates and users may see the same emails twice. Let’s know how to fix them.
- Start Microsoft Outlook and select Info > Account Settings as shown in the below figure.
- Choose Account Settings from the available drop-down options.
- If you see a duplicate account is configured then select it and choose the Remove option.
4) Use Clean Up Folder & Subfolders Option
- Run Microsoft Outlook and select an email folder that has duplicates.
- Thereafter, select the Home > Clean Up option as shown on the respective screen.
- Select the choice option to remove email duplicates such as Clean Up Conversation, Clean Up Folder, and Clean Up Folder & Subfolders.
- If you choose Clean Up Folder & Subfolders then all redundant messages in the current folder and its subfolders will be moved to the “Trash” folder.
- Now click on the Clean Up folder option to continue cleaning the duplicates.
- Open the Trash folder and Eliminate duplicate emails from PST permanently.
Automatic Vs Manual Process
| Method | Outlook Automated Duplicate Remover | Manually Identify
& Delete |
Outlook Import/Export | Outlook Clean Up | Remove Duplicate Accounts |
| Works Well For | Multiple PST files | few duplicate emails | Prevent Duplicate Emails during PST Import | Repeated Emails Across Conversations and Folders | Duplicate Emails Due to Account Configuration |
| Finds Duplicated | Full Automatic | Manually | Limited | Limited | NA |
| Bulk Processing | Available | NA | NA | Limited | NA |
| Across Folders | Available | NA | NA | Limited | NA |
| Duplicate Criteria | From, To, Cc, Subject, Body, Attachments, Date/Time | Subject, Sender, Date | Import-based matching | Conversation-based | Import-based matching |
| Requires Outlook | NA | Required | Required | Required | Required |
FAQs
Que 1: Which is the best technique to remove duplicate emails from PST files?
Ans: We have mentioned all available possible methods to delete duplicate emails from PST files. However, the above-suggested software is best in all conditions as this simple and guaranteed solution.
Que 2: What are the extra benefits of software that are missing in manual approaches?
Ans: The unique features of software are mentioned below:
- Pre-define the maximum size for resultant PSTs.
- Remove duplicate emails in PST by date range, email subject, and address.
- Search duplicate emails within and across the folders.
- Delete duplicates based on From, To, Cc, Subject, Body, Attachments, and Time.
- Create PST folders in different international languages for Non-English Outlook.
- Repair corrupted PST files and get a healthy output without duplicates.
- Microsoft Outlook installation is not mandatory.
Que 3: Why do duplicate emails accumulate in PST files?
Ans: There are multiple possible reasons for duplicate emails in Outlook PST files:
- Setup incorrect rules in the Outlook application.
- Configuration of multiple duplicate email accounts.
- Error while setup email accounts.
- Slow internet and antivirus programs.
- Allow duplicates to be created during import.
Que 4: Can I delete duplicate emails from PST file exported from Outlook 2024?
Ans: Don’t worry! The tool is compatible with PST files of Outlook 2024, 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 98, and 97. It supports both ANSI and Unicode PST files.
Que 5: What are the benefits to remove duplicate emails in PST files?
Ans: Removing duplicate emails from PST is beneficial because:
- Free up storage drive space.
- Increase the performance of Outlook.
- Avoid search-related confusion.
- Avoid Outlook corruption due to oversized PST.
Que 6: How to delete old emails in Outlook in bulk?
Ans: To Delete Old Emails in Outlook in bulk, users can use a dedicated tool to make the process faster and easier. The tool will scan PST files, identify unwanted or duplicate emails and remove them in bulk without requiring users to process each message individually.
Final Thoughts
At the end of this blog on topic, “Remove duplicate emails from PST file.” We have shared five working methods to remove duplicate email in Outlook PST file. We also had shared manual methods for the users who are looking for free ways to delete duplicate emails from PST. We found using manual approaches is time-consuming, prone to human errors, has a risk of accidental original email removal, which is not suitable for any users if who are using Outlook. At this point, using an automated solution is smart option to securely remove duplicate email in Outlook PST file.
Now, it’s up to you which techniques you are going to choose to save your time & efforts for removal of duplicate emails from PST file. Lastly, If you have any other doubts about this problem then feel free to reach out our support team.
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