Why Does Mozilla Thunderbird Create Duplicate Mailbox Emails?

Why Does Mozilla Thunderbird Create Duplicate Mailbox Emails?

As we know that Thunderbird is a free,reliable and open-source email client provided by Mozilla foundation. It is a preferred choice among users to integrate several webmail accounts in it. Accumulating duplicate emails dramatically inflates mailbox folder sizes,slows down search performance,and exhausts local storage space. To resolve these storages and indexing limitations,cleaning out redundant database entries is highly recommended. This article provides a comprehensive walkthrough detailing how to securely delete duplicate emails from your active Thunderbird mailbox profile without risking data corruption.

Need to delete duplicate emails of Thunderbird

Having a few duplicate emails in Thunderbird is not a big issue but when we have thousands of duplicate email messages,it is required to remove all these duplicate emails through an appropriate solution. When users access webmail application in Thunderbird,there are various chances to receive duplicate mailboxes.

Possibilities for duplicate emails

Know other reasons to receive duplicate emails in Thunderbird –

• Server related issues:The server has an important role to send and receive emails in the email client. Sometimes,the server downloads the same email repeatedly which causes duplication of emails in Thunderbird application.
• Issues from the sender's side:Sometimes the sender sent the same email message again and again that leads to Thunderbird receiving duplicate emails on the receiver's end.
• Accidental User activities:Having multiple folders and subfolders in Thunderbird,the user copies a mail to any other subfolder of the application which causes duplicate emails in Thunderbird.

Method 1:Using Thunderbird Free Add-ons

In order to remove duplicate mailboxes from Thunderbird,users have the choice to do it manually.

Steps to manually remove Thunderbird duplicate emails –

• Step 1:Open Mozilla Thunderbird application.
• Step 2:Click on the Application Menu or open the Tools menu,then select Extensions and Themes.
  

  Select Extensions and Themes in Thunderbird
• Step 3:Once the Add-on Tab gets opened,search for "remove duplicates" and hit the search button.
  

  Search for Remove Duplicates Add-on
• Step 4:You will find the "Remove Duplicate Messages" add-on. Click on the Install button.
  

  Install Remove Duplicate Messages Add-on
• Step 5:After its successful installation,hit the Restart Now button.
  

  Restart Thunderbird to Apply Add-on
• Step 6:When Thunderbird is restarted,follow step 3 again (search for "remove duplicates" and hit Enter).
  

  Verify Duplicate Removal Add-on
• Step 7:Then,go to the add-ons section.
  

  Navigate to Add-ons Section
• Step 8:Now,go to the account and right-click on the mailbox folder from which you want to delete duplicate emails.
• Step 9:Choose the "Remove Duplicate Messages" option.
  

  Select Remove Duplicate Messages
• Step 10:If the selected folder does not have any duplicate emails,it throws a message indicating no duplicates were found. Click OK.
  

  No Duplicates Found Alert
• Step 11:If the folder contains duplicate emails,it will open the Duplicate Messages window showing you the total number of emails held by the folder and the number of duplicate emails to be deleted.
  

  Duplicate Messages Summary Window
• Step 12:Now,click on the Delete Selected button to remove the duplicate messages from Thunderbird.
  

  Click Delete Selected
• Step 13:You will get a message to confirm deleting the messages. Click OK.
  

  Confirm Deletion Dialog

Method 2:Use Softaken MBOX Duplicate Remover (Professional Solution)

You can see that the manual solution is quite lengthy and complicated for a novice user. Also,you need to manually select folders one by one to remove duplicate email messages with the manual solution,making it a time-consuming and inappropriate method for a huge database. Therefore,we recommend using a professional solution by Softaken named MBOX Duplicate Remover. You can load all mailboxes of Thunderbird at once and easily fix all duplicate emails from all mailbox folders. Let us see the working of the software:

• Step 1.Install and start the application on your Windows device.
• Step 2.Choose "Load Default Thunderbird directory". It will load Thunderbird mailboxes automatically. You can use File or Folder mode if you have manually exported Thunderbird emails into MBOX file format.
  

  MBOX Duplicate Remover Interface
• Step 3.Select a duplicate remover type – choose either across all folders for removing duplicate emails or select within each file/folder.
• Step 4.Mention an output path by using the Browse button.
• Step 5.Finally,hit the Remove Duplicate Emails button to commence the process of removing duplicate emails.

Within a few minutes,it will show you the number of duplicates and you will find the resultant files with all duplicate emails removed at the specified location.