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Thunderbird Not Responding When Deleting Emails? Solution to Fix

Mozilla Thunderbird is one of the popular mail clients for the users. But, there have been frequently encountered problems with it where the application simply freezes while deleting the emails. This behavior can really worry users. Also, when it comes to the larger size of emails. If you are facing such issues, do not worry! We shall see the possible reasons for Thunderbird not responding when deleting emails.

Why Is Thunderbird Not Responding When Deleting Emails?

There are a few reasons why Thunderbird freezes while deleting emails.

  • When the Trash folder is corrupted, Thunderbird has a hard time moving deleted emails.
  • A mailbox full of thousands of emails can slow things down for Thunderbird. 
  • Thunderbird stores emails in MBOX format, and the corrupted MBOX file can create problems.
  • Some Thunderbird add-ons can conflict with or interfere during the email deletion process.
  • For IMAP accounts, sync errors may stop emails from being deleted properly.

Manual Methods to Fix Thunderbird Not Responding When Deleting Emails

Restart Thunderbird in Safe Mode

Safe mode disables all add-ons, helping you establish whether or not an extension is causing the issue.

Here are the steps to do this:

  1. Exit out of Thunderbird completely.
  2. While you are opening Thunderbird, hold down the Shift key (Windows) or Option key (Mac).
  3. Click on Continue in Safe Mode and try deleting an email.
  4. If you succeed, you can then disable the offending add-ons by going to Tools > Add-ons and Themes > Extensions.

2. Trash Folder Repair

Another tool to try if the Trash folder is corrupted.

Three way steps:

  • Right-click on the Trash folder in Thunderbird.
  • Select Properties > Repair Folder.
  • Click OK and restart Thunderbird.

3. Trash Folder Empty Creation

If repairing doesn’t do the trick, you can try to recreate the Trash folder.

Steps:

  • Close Thunderbird.
  • View to the Thunderbird profile folder.

  For Windows: C:\Users\YourUsername\AppData\Roaming\Thunderbird\Profiles\yourprofile.default\Mail\yourmailserver

  For Mac: ~/Library/Thunderbird/Profiles/yourprofile.default/Mail/yourmailserver

  • Locate the Trash and Trash.msf files and delete them.
  • Now, restart your Thunderbird application. It will recreate the Trash folder automatically.

4. Compact the Folders to Enhance Performance

Compacting folders helps in getting rid of the unwanted data and helps Thunderbird run with speed.

Steps:

  • Click File > Compact Folders.
  • Wait for the process to complete and check for continued issues.

5. Check and Repair the MBOX File

The MBOX file can be manually repaired if it is corrupted in Thunderbird.

Steps:

  • Close Thunderbird.
  • Find the MBOX file that corresponds with the folder affected (like Inbox, Sent or Trash).
  • Use the text editor to open it (like Notepad++).
  • Delete anything such as unusual characters or corrupted data.
  • Save the file and start Thunderbird.

6. Update Thunderbird

An update can be required which may improve performance of your particular application.

Steps:

Start up Thunderbird.

Click Help > About Thunderbird.

Download any updates available and restart Thunderbird.

7. Reconfigure IMAP

If synchronization problems are still there, then reconfiguration of an IMAP account could be the solution. To do this, follow the given steps:

  • Go to Tools > Account Settings > Server Settings.
  • Check IMAP settings for correct server details.
  • If the problem still exists, delete and re-add the IMAP account.

8. Reinstall Thunderbird Without Losing Emails

If none of the other solutions seem to work, then a reinstallation of Thunderbird will fix a deeper software issue while preserving your emails.

Steps for Safely Reinstalling Thunderbird:

  • Backing Up Your Thunderbird Profile.
  • Go to Help and choose Troubleshooting Information in Thunderbird.
  • Under Profile Folder, you need to click on Open Folder to find your Thunderbird data.
  • Take back up the entire profile folder into some safe location.

Instant Way to Fix Thunderbird Not Responding When Deleting Emails Problem

This problem can be due to present corrupted profiles, large mailbox sizes, and inappropriate settings that could be responsible for Thunderbird not responding at the time of deleting emails. For efficient resolution of this problem, you can use our professional tool to import MBOX to Thunderbird. which can help import MBOX files into a new Thunderbird profile. Therefore, maintaining the mailbox and avoiding lagging or freezing problems to not happen again. By properly organizing the emails you can boost Thunderbird performance and prevent errors in the future.

Conclusion

In the case that Thunderbird stops responding when deleting emails, it is most probably due to corrupted Trash folder, MBOX file corruption, errors in syncs from IMAP, or outdated software. Manual solutions for these issues from repairing Trash folder, compacting folders, or updating Thunderbird can solve the problem easily. If the problem persists, it may be good practice to reinstall Thunderbird or go for our professional tool to quickly solve this Thunderbird error in a few steps.