Remove Duplicate Emails in Thunderbird: Best Practices

We all know that Mozilla Thunderbird is a popular email application that lets you use multiple email accounts in one place. Sometimes, it can create duplicate emails, which can take up a lot of space. However, this article will show you how to easily remove duplicate emails in Thunderbird and free up space in your mailbox.

“I recently switched from Outlook to Thunderbird and noticed a bunch of duplicate emails in my Trash and Sent folders. These emails have the same titles, dates, and times. They’re taking up a lot of space on my computer. Is there a quick way to get rid of them?”

Scenarios for Deleting Duplicate Emails in Thunderbird

Having a few duplicate emails on your personal computer is a small deal. But in businesses, it can be a problem. Sometimes, when you move emails from Thunderbird to other email programs like Outlook, you end up with duplicates. These duplicates can take up a lot of space. You can easily delete them manually, even when moving emails from MBOX to Outlook.

Sometimes, duplicate emails appear unexpectedly in Thunderbird. As a result, this can happen due to user actions, sender mistakes, or server problems.

• User actions: If you have multiple folders in Thunderbird and copy emails between them, it can create duplicates.
• Sender mistakes: If the sender accidentally sends the same email multiple times, Thunderbird might save it as a duplicate.
• Server problems: If the email server is not working correctly, it might keep sending the same email repeatedly.

4 Methods to Remove Duplicate Emails in Thunderbird Account

Deleting duplicate emails in Thunderbird can make your email app work better and look more organized. Here are some ways to do it.

#1. Remove Duplicate Messages From Thunderbird Manually

Follow the below steps for deleting duplicate emails in Thunderbird using an add-on:

• To begin, open the Mozilla Thunderbird application on your PC.
• Afterwards, go to Tools > Add-ons.
• Then, search for “remove duplicates” and install the “remove duplicate messages” add-on.
• Next, restart Thunderbird.
• Now, search for “remove duplicates” again.
• Further, go to My Add-ons.
• Right-click on the folder you want to clean (like Inbox, Sent, or Drafts).
• Then, choose “Remove Duplicate Messages.”
• If there are duplicates, a window will show you how many emails are being deleted.
• Here, click “Delete Selected” to remove the duplicates.
• At last, confirm the deletion by clicking OK.

#2. Delete Duplicate Emails in Thunderbird Through the Search Option

Here’s a manual way to find and delete duplicate emails in Thunderbird using the Search option:

• First, open Thunderbird and go to the folder with duplicate emails.
• After that, sort the emails by Subject, Sender, or Date to group similar ones together.
• Then, look for emails that are the same. Keep one copy of each.
• Subsequently, select the duplicates, right-click, and delete them.
• In the end, empty the Trash to permanently remove them.

#3. Eliminate Duplicate Emails Using Filters in Thunderbird

Here’s how to use filters to automatically remove duplicate emails in Thunderbird:

• Initially, open Thunderbird and go to Tools > Message Filters.
• Afterwards, click “New” to create a new filter.
• Then, name the filter “Duplicate Email Filter” and set conditions to match duplicate emails.
• Set the filter to move matching emails to the Trash.
• Subsequently, click “OK” to save the filter.
• At last, click “Run Now” to apply the filter immediately. However, this filter will automatically delete future duplicate emails.

Manually deleting duplicate emails in Thunderbird can be time-consuming and difficult. If you want a simpler way, you might want to try using an alternative option.

#4. Remove Duplicate Messages in Thunderbird – Pro Solution

With the help of the Cigati Thunderbird Backup Tool, you can avoid duplicate emails. In short, it deletes duplicates without losing any data and lets you preview your emails before converting them. You can also remove duplicates during the conversion process. This tool is great for removing many emails at once while keeping your data safe. We’ll explain how to use it step-by-step.

Steps to Delete Duplicate Emails in Thunderbird

• Install and run the Cigati Thunderbird backup Tool.
• Then, mention the required ID and password of Mozilla Thunderbird to initiate the exporting process.
• Here, you can preview the targeted files or folders and highlight them that you want to move into PST format.
• Now, choose the PST file from the drop-down list.
• Next, opt for the Remove Duplicates on the Basis of Fields.
• At last, specify the destination path and hit the Convert button to initiate the conversion process.

Concluding Lines

Deleting duplicate emails in Thunderbird can make your email app work better and look more organized. Manual methods can work, but the Cigati Thunderbird Backup Tool is faster and easier. These tools let you see your emails before you move them and can handle many emails at once. By deleting duplicates, you can free up space, make your emails look cleaner, and improve how you manage your emails overall. In addition, it totally depends upon your choice of where you feel comfortable when you try to remove duplicate emails in Thunderbird.

You May Also Read: Migrate Thunderbird to Mac Mail

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