How to Remove Duplicate Emails from Postfix Accounts?

Rollins Duke   
Published: July 26th, 2023 • 5 Min Read

A common problem arising among Postfix users is duplicate emails. You may be trying to figure out why you are getting so many copies of your emails on your Postfix account. Some users have thousands of duplicate emails, and some have lakhs. This article will walk you through the most successful solution to remove duplicate emails from Postfix account.

Duplicate emails lead to frustration and a struggle to find the email that we actually want. The number of duplicates available in the account depends upon the person or industry. A normal Postfix email user can have a few duplicate emails, but a company can have unlimited duplicate emails. For both, we need to utilize the same solution which can discard entire Postfix duplicate emails at once.

Reasons to Receive Duplicate Emails in Postfix

  • Incorrect technical configuration or setting.
  • Sending, receiving, and forwarding emails on a loop.
  • Using multiple devices to access Postfix emails.
  • Importing and exporting emails from different servers and different devices.

Now we will discuss two methods to remove duplicate emails from Postfix, Manual and professional.

Recommended: Reliable Way to Remove Duplicate Emails from Sendmail

Strategy 1: Manual way to Delete Duplicate Emails in Postfix

Postfix does not provide any in-built feature to discard duplicate emails, the only way is to select the unwanted email and delete it. This technique only works when the user has 2-3 duplicate emails. However, this is not a recommended method as it takes too much effort, and time while driving you into risk. If you want to avoid these obstacles, you must use the professional way of clearing Postfix duplicates which we have provided below the manual steps.

If your Postfix mailbox has just welcomed a few duplicate emails, then follow these steps:

  1. Access your Postfix account and open your mailbox.
  2. Look for Postfix duplicate emails from the entire mailbox and select it.
  3. After selecting the duplicate, a number of options will appear on the screen.
  4. From the options menu, click on the Delete button.

Read Similar: Techniques to Delete Duplicate Emails in Gmail

Strategy 2: Pro Way to Remove Duplicate Emails from Postfix

The best way to remove duplicate emails from Postfix is using the software which is especially used to solve this problem. BitRecover Maildir Duplicate Remover discards unlimited duplicate Postfix duplicate emails from all folders at once.

The Postfix duplicate remover offers two different modes to remove duplicate emails in Postfix folders. You can choose between these options based on your specific removal requirements.

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If you believe there are duplicate Postfix files within specific folders, select the “Find duplicates within the folder(s)” option. The Postfix duplicate remover will then scan duplicate Postfix files within each folder separately and remove them accordingly.


If you suspect that Postfix duplicate email messages exist across multiple folders, opt for the “Find duplicates across the folder(s)” option. The Postfix duplicate remover will conduct a comprehensive scan across all folders, identifying and deleting Postfix duplicates from all folders simultaneously.

How to Remove Duplicate Emails in Postfix Server?

To start the Postfix duplicate removal procedure from Postfix, complete these 3 stages:

Stage1: Export Maildir Files from Postfix to PC

  1. Open Postfix, go to the mailbox, and click on the Export button.
  2. Choose the location and Save Postfix emails on your computer.

Stage2: Use Software to Fix Postfix Exported Emails

  1. Download and install the Postfix duplicate remover tool. Once the installation is complete, click on the “Next” button.
    postfix duplicate remover
  2. Next, add the Postfix files or folders you want to process, either individually or in multiples. Then, click on the icon labeled “Next“.
    dual option
  3. If you are adding multiple Postfix user mailboxes, select the option “I Am Converting Multiple Users” and add the folders accordingly.
    multiple users
  4. Alternatively, if you are adding files, browse through your device to select single or multiple files.
    add files
  5. All the folders and subfolders will be displayed on the software’s panel. Check or uncheck the folders as per your requirements and click the “Next” button to proceed.
    select files
  6. Choose between the options “Search Duplicates Within the Folders” and “Search Duplicates Across the Folders” based on your preference.
    within and across folders
  7. Utilize the “Filter Option” tab to apply advanced filters for specific data, if needed.
    advanced filter
  8. By default, the Postfix duplicate remover will choose the Desktop as the destination for the extracted data. If you want to change the location, use the “Browse” button to select the desired location.
  9. Start the process by clicking on the “Extract” option.
    extract button
  10. You can monitor the live process, as shown in the provided screenshot.
    remove duplicate emails from postfix
  11. Once the task is completed, a confirmation message will appear. Click the “OK” button to proceed.
    delete duplicate emails in postfix
  12. Afterward, an automatically generated log report will open, containing details of the process.
    log report
  13. The selected location for the extracted folders will also open automatically.

Stage3: Import Resultant Data Back to Postfix Account

  1. Open your Postfix account and go to the Import button.
  2. Choose the files from the computer where you saved it after removing the duplicates.
  3. Click on the Import button, and your fresh duplicate-free mailbox will be back in your Postfix account.

So yeah! That’s all you need to do to remove duplicate emails from Postfix. The software provides the most popular way to easily discard all duplicate Postfix emails in just a few clicks.

Read Also: Guide to Remove Duplicate Emails from KMail