I think View>Sort by>Unthreaded will do what you want.

Genius. Thanks.

That's what Mom always said. Thanks. If this resolves the issue, please mark it closed so it gets removed from open issues list. Thanks.

I am having this threading issue and cannot get it to stop since v102? I do what is suggested but then a few days later, another email that has a few back and forth replies starts grouping again - I don't get it. It there a permanent fix to have Thunderbird never create these groups or threads? I just don't want it at all. I would just like every email to show up on the screen as separate messages all the time. Thanks for any tips :)

More info: To change default for new folders, In config editor, you can change default that applies to NEW folders you set up: mailnews.default_view_flags 0=unthreaded

Config editor is available at Tools>settings>general and scroll to bottom right.

 ------------

To set many *existing* folders, follow these steps:

  In the Message List view, in the column header, on the far right, open the options button that shows    
   context menu. (See attached screenshot):
  At the very bottom is the option:
  -> "Apply current view to..."
  -> "Folder and its children..."
  -> Hover over an account
  -> In the next menu don't select a folder. Instead select the account name itself.

This isn't a perfect solution, but it does address the issue of unthreading many folders.

Thanks David, I am going to try this. Much appreciated :)

I am having this threading issue and cannot get it to stop since v102? I do what is suggested but then a few days later, another email that has a few back and forth replies starts grouping again - I don't get it. It there a permanent fix to have Thunderbird never create these groups or threads? I just don't want it at all. I would just like every email to show up on the screen as separate messages all the time. Thanks for any tips :)

This is my question also. I can't believe there is no way to globally turn off threading. For me this only started recently that random messages would appear as threaded, and when I change to view, sort by, unthreaded, it reverts, but then in a few hours or a few days the same messages start displaying as threaded again. Something seems to have broken in one of the upgrades

I can't duplicate what you're seeing. I have the release version, beta, and daily and the folders remain unthreaded since I set them months ago. My only thought on this is just a guess that an antivirus program may be interfering with Thunderbird updates. But that's just my guess.

Hi, since trying the suggested settings in the post from November 22, I have only had an issue once. If I send an email, receive a response and then I respond back and then I receive another response, I seem to get a single entry in the email inbox that shows all 3 emails in the correspondence linked together. I definitely never saw this in prior versions and I didn't modify any settings myself. I don't believe it has any bearing on my anti-virus software and I always seem to get any Thunderbird updates with no issue. Currently running version 102.6.1

I just thought it may help to post my experience - Thanks

Well, I just did ten emails to create a thread and it says unthreaded. I remain clueless on this. From this end, all seems to be working properly. But I will admit that doesn't mean the problem isn't surfacing. I will be sure to check immediately on next update to see if the unthreaded setting changes.