Folder is located where? I have never heard of it by name but a Google search associated the ESS acronym with something called Engineering Equation Solver. Perhaps it rings a bell with you.

It showed up as a main folder in my Local Folder tree. Not sure how long it has been there. And no, Engineering Equation Solver rings no bells.

It is not a Thunderbird default folder. That is about all I can add.

This folder is created when using the addon

Edit Email Subject (EES) 7.2 

The folder contains a backup copy of the initial emails when using the addon to edit the subject of any email.

Thank you. I do use an edit subject AddOn, but it is EditEmailSubject MX. It's curious because it doesn't seem to have all the emails I have edited subject lines on and it has one old one from 3 years ago.

I have another question. From the AddOn tab in TB I searched "editemailsubject" and neither EditEmailSubject MX or EditEMailSubject EES came up. I then used Firefox to go directly to this page <https://addons.thunderbird.net/en-US/thunderbird/> and then searched for it and it did come up but listed as EES and not MX.

Why is the search from within TB giving different results than the search on the AddOns website.

Then I opened the management page of EditEmailSubject MX from within TB where I have it installed, and clicked on its homepage at <https://github.com/cleidigh/EditEmailSubject-MX> and there the name still seems to be MX.

I have checked some more and you are definitely correct. The EES-Temp folder is populated by copies of emails whose subjects I have edited with EditEMailSubject MX. Curious why I never noticed it before and why it only has emails up to 1 month old; I have been using this addon for at least 6 months, perhaps a year.

Anyway, still would like it if someone an answer my question about why the AddOn search fcn from within TBird doesn't pull up all the AddOns that you can find if you go to the thunderbird addons page in Firefox.

Anyway, still would like it if someone an answer my question about why the AddOn search fcn from within TBird doesn't pull up all the AddOns that you can find if you go to the thunderbird addons page in Firefox.

Thunderbird shows add-ons that are compatible with the version you are running. Firefox just shows them all. Bottom line is the use of a browser while supported shows a load of old garbage and some serious manual filtering is required to find stuff that is actually supposed to work.

Matt, I'm not sure you are correct. When I search on "editemailsubject mx" from within TB it does NOT come up. According to your reply that would be because it does not work with version 102.13.1 which is what I have installed. However I have EditEmailSubject MX currently installed and it is working fine. Not only that but searching from within TB pulls up totally irrelevant hits. For example, with the search listed above it finds PopMailListRecipients 2, which would seem to have nothing in common with my search term. Thoughts?

Also, do you know what the difference is between a green box that says "+ Add to TB" and a gold box with diagonal stripes that says "+ Add to TB"?

Thank you.

Matt, I'm not sure you are correct.

I love people asking questions and then decidinbg the answer is not correct because it does not fit their views on the world.

When I search on "editemailsubject mx" from within TB it does NOT come up.

And you already have the add-on installed yes? Forgive me for not including that proviso, but then I really did not consider that anyone would be searching on the add-on site for an add-on they already had installed. I would expect them to be looking at what they had installed and it's settings, not making a random search of the web for the same thing.

According to your reply that would be because it does not work with version 102.13.1 which is what I have installed. However I have EditEmailSubject MX currently installed and it is working fine.

So why are you searching the site for an addon you have installed? Is it you can't find the installed copy? Is there a problem with the user interface that leaves you searching?

However the URL issued by Thunderbird to search the site for my version is https://addons.thunderbird.net/en-US/thunderbird/search/?q=Edit%20Email%20Subject&appver=102.13.0&platform=WINNT

 i.e. it must work with V102.12.0 in my case and on WindowsNT platform

I look at the ATN web site and see the release version is registered as supporting V115.* Nothing lower. Sure there are previous versions that work with V102, but the one you get when you click the link will not work with V102. SO it is not displayed internally to Thunderbird.

Not only that but searching from within TB pulls up totally irrelevant hits. For example, with the search listed above it finds PopMailListRecipients 2, which would seem to have nothing in common with my search term. Thoughts?

Personally I have little interest in the finer points of the website. (Which has it's own github repository https://github.com/thundernest/addons-server/issues/new it is not supported here ) It is the one Mozilla replaced years ago for Firefox when they introduced code signing for add-ons. It is still doing duty as a web site for Thunderbird, basically unchanged. It's about information even still refers to the site as AMO (addons.mozilla.org), the Firefox site. If you have views on how it should work, I suggest you share them with the developers via the feedback site. https://connect.mozilla.org/ Or using the link on the help menu in Thunderbird.

Also, do you know what the difference is between a green box that says "+ Add to TB" and a gold box with diagonal stripes that says "+ Add to TB"?

Green buttons are fully code reviewed, the gold ones are more experimental and pose a somewhat higher risk to you. But it is a lot of years since I saw any sort of description so my recollection is vague at best.

All very interesting, no doubt. EES-Temp has only appeared in my TB since I restored v. 102 (I didn't like the 'upgrade' that was forced on us). I have discovered that 'EditEmailSubject MX' has an option to disable the "backup of original files to the folder 'EES-Temp' before renaming them ".

Thanx for the tip. However, I have stopped using EditEmailSubject MX since it does not work so well in TB115 and I have found the Header Tools Improved works much better. Try it, you may like it.

Thank you. I am not using TB115. I tried it and it was awful. I have reverted to TB102, but some TB115 changes seem to have persisted (like the font in the Inbox). I don't care for it much, but lack the will to see if I can change it. One thing I particularly disliked about TB 115 was that it appeared impossible to download individually from different servers, the only option seemed to be to download from them all.

I accidentally upgraded to 115; I had wanted to wait awhile. But I have become happy with it. I particularly like the new vertical layout with the message pain on the right. It works great on my large monitor. I too have multiple accounts on compuserve, comcast, and gmail and I guess they all do update together. I haven't found that a problem. I didn't realize it could be independent in 102.

I accidentally upgraded to 115; I had wanted to wait awhile. But I have become happy with it. I particularly like the new vertical layout with the message pain on the right.

That vertical view was available in Version 2. I know I tried it back then and rejected it because if I wanted to do it the Outlook way I would never have left that product.

It works great on my large monitor. I too have multiple accounts on compuserve, comcast, and gmail and I guess they all do update together. I haven't found that a problem. I didn't realize it could be independent in 102. </blockquote>

In 102 the get mail was based on the currently selected account in the folder pane. Many, many users complained that it was broken because they expected it to get all mail from all accounts, so the developers changed the default. Interestingly what folk assume has become the defaults for much of computing because no one reads the support documents or invest the time to investigate what the software can do.

Despite many post from folk bemoaning the fact that there is no get mail for individual accounts, it is there as a right click on the get mail cloud button. I must assume many people are not aware that Thunderbird's user interface is completely full of right click menus and they are still struggling along with their Apple single button mouse. (That right click is a command click on your apple single button mouse)

I have always wondered why it is anyone cares when their mail is checked these days, as long as it happens when the program starts and periodically thereafter. Half a life time ago when I had a rather primitive dial up internet connection control of anything that used bandwidth was imperative, but seriously those days are long behind us. SpaceX has brought high speed unlimited bandwidth to even the most remote locations. For a price undoubtedly,but it has placed a new definition on internet where I live.