Answered: How can I delete duplicate emails from Thunderbird MBOX file easily?

To delete duplicate emails from a Thunderbird MBOX file without losing important data or affecting the original folder structure, you can use an add-on or third-party tool. One popular add-on is "Remove Duplicate Messages" for Thunderbird. Here’s how you can use it: 1. Open Thunderbird and click on the menu button (three horizontal lines) in the top-right corner. 2. Go to "Add-ons and Themes" and search for "Remove Duplicate Messages." 3. Install the add-on and restart Thunderbird if prompted. 4. Once the add-on is installed, go to the folder where you want to remove duplicates. 5. Right-click on the folder, select "Remove Duplicates," and the add-on will scan and present you with a list of duplicate emails. 6. You can review the duplicates and decide which ones to delete to ensure no important data is lost. Make sure to back up your Thunderbird data before performing bulk operations, to prevent any accidental data loss.