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Sort of continuing from https://support.mozilla.org/en-US/questions/1423702

Now trying 139.0.2 on a old laptop the subfolders are not mixed in the root anymore, but when opening TB, the subfolders are only partially listed. The listing changes every time.

TB then creates/downloads the missing ones/the subfolder structure but then leaves them all displayed as open/uncollapsed, which is a massive folder tree to navigate down. Takes ages and is a total pita.

We could even live with being able to collapse all the folders in one action, but there is no command for that.

I read elsewhere it may be a problem with OAuth so changed to app password, no difference.

Maybe it's the very large quantity of subfolders...

I note that the profile folder is the same size when TB is opened or closed....indicates that TB has the folders downloaded but needs to sync to display them?? No idea really.

But, we've been avoiding updating for a year and a half, need a solution or another client.

Thanks for any help.

The email system was working perfect;y for my 2 Comcast.net email accounts. I needed to change one of the passwords. Now for this account, all I get is the message "Login to Server Imap.Comcast.Net with username [my email address] Failed".

Sometimes, when I enter the password, Thunderbird accepts it and loads any new emails...but within a few seconds, I get the failure message again.

I have rebooted my Dell desktop several times with no luck. I have also discussed this with Comcast support who tell me that the Thunderbird system needs to be optimized...whatever that is.

Any assistance would be appreciated.

I love Thunderbird, I think it is an excellent product all round, but one thing that really, really niggles me is that it continually marks certain senders as junk.

I receive Emails from these senders all the time, and often miss Emails because Thunderbird has marked them as junk, and moved them to the Junk folder, which means I don't see them on my mobile devices (IMAP).

I've marked this sender as "Not Junk" at least a thousand times. Each time it accepts my tag, and moves the Email back to the Inbox. However, that doesn't last, as the next Email, or the one after, or the one after that, ends up in Junk again.

I've seen a few posts that protest - this is not Thunderbird's fault, it's your Email provider, but I've already crossed that one off the list as I have white listed the entire domain at the Email provider. So nothing is getting flagged from the Email provider, to hint that it might be junk.

I'm always on the latest version of Thunderbird, and I have adaptive junk filter logging enabled, but it is completely empty of any logs. I also have "Do not automatically mark mail as junk if the sender is in "collected addresses" & "personal address book". I have a number of entries from this domain in the personal address book, as well as *.@domain-name.com, though I'm not sure if that format is correct to capture the entire domain.

Any help on this matter, gratefully received.

M

After installing upgrade to 139.0.2, POP downloads failed. Last was on 6/19/2025 at 8:19PM. I deleted both saved passwords.. Went to AOL and generated a new APP password but there was no way to upgrade to it. I sent a test message to myself [ smtp] and AOL logged me in and TB generated the saved password oauth://login.aol.com (mail-w).

However even with shutdown TB and restart, there was no request for a POP password [ such as the new AOL APP generated one. What should I do? Is this a bug? I can read and use AOL mail on my browser [EDGE]. LKint@verizon.net

Dear users,

I installed thunderbird on my pc only to open .mbox files containing archives from past years.

I read in the guide I need to add a plugin called ImportExport NG to open mbox files, but first I have to see the "local folders", which doesn't exist.

I attached the screenshot of thunderbird just installed on my pc and launched. I miss the "local folders".

How can I fix?

Thanks

Recovery of thunderbird forced change of message structure. Old tried and true layout became irrecoverable. Install phase of new thunderbird is not the time to go dicking around with the existing data structures. (which you yourself decided on ages ago).

How do I roll back the unwanted "upgrade" of thunderbird ?

Thanks,

I can get to the "stored passwords" box, but the email I need to change the password for isn't listed there. I have tried to send and receive messages but nothing makes a "enter your password" box pop up. All I get when it tries to retrieve messages from Gmail is a box to give my email, (just that, not a password) and then an error message that it won't work and there is no more information. I'm using Linux. I've had both this particular email address (as well as others) and Thunderbird for years, perhaps two decades, and I can't figure out what to do now. I was going to change all my email passwords for security reasons, but there's no way I can do that until I can get Thunderbird working with POP access again. Thank you.

I sent an email to myself and got: Sending of the message failed. An error occurred while sending mail. The mail server responded: RCPT TO:<[email removed]@bell.net> User unknown. Please check the message recipient "[email removed]@bell.net" and try again.

How can I fix this?

Since 17th June any email I send to an hotmail account is being returned with the message

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed permanently:

  * (removed)@hotmail.com

Reason: A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server ?? responded with: ** (removed)@hotmail.com ??:?? This message was created automatically by mail delivery software on the server .

I have not made any changes, and it worked previously for years - do you have any suggestions as to the problem? I have tried sending to 3 Hotmail accounts and are all being returned - all other emails work correctly.

I am using plusnet.

Hi,

I have just started using Thunderbird and I'm trying to change the default colour for a hyperlink.

I have tried about:config -> browser.anchor_color and browser.active_color but neither has worked.

I also tried using a user.js file but that didn't work either.

I would have thought this would be a fairly basic thing but it seems to be impossible.

error: "An error occured while sending mail. The Mail server responded: *My username* sender address rejected: Not owned by user *My username** please check the message recipent *___* and try again.

I accidentally dropped my "Bulk" folder in the "Trash" folder. When I tried to remove the folder, it refused to move!

1. I tried ctrl + Z to undo the last action - failed
2. I tried dragging and dropping - failed
3. I tried right-clicking and choosing move - no such option - failed

I tried closing the program, reopening, and repeating steps 1-3 - failed I tried rebooting the computer and repeated steps 1-3 - failed

How can I move the folder back?