Thunderbird Community Forum

Suddenly I am getting a pop-up window on Thunderbird asking me to sign in to continue with Mozilla Thunderbird email. It populates my email address and after clicking ‘next’ it says.

‘400. That’s an error. The server cannot process the request because it is malformed. It should not be retried. That’s all we know’.

i cannot send or receive through Thunderbird, at present. Who is the genius out there that can tell me what to do?

I've installed the latest desktop version of Thunderbird to evaluate. The signature is added only for new messages and not included when replying or forwarding a message. I've tested the signature with both plain text and html signature - both doesn't work as expected. I've also tried pasting the html code in the input field and attaching it as a file. Is this an intentional omission of functionality or I'm I missing something? I'm attaching my account settings interface.

I bought a new PC in February, backed up all emails and transferred onto new PC. All working fine until last week when windows OS crashed the new PC, managed to re-download Thunderbird and installed everything from back-up USB emails up to February. From February to today no emails have been uploaded in the "local folders". Is there a cloud/ server that stores my old emails in the local folders, so I can recover them, or even a program?

I am running TB 138 and still have some issues with the layout and UI. How can I customize the spacing and font size for the "From", "To", "CC" and "Subject" fields? I much prefer the old TB interface where all these fields were much closer in terms of spacing, and the subject line font was same the size as the rest, in bold. Any way to customize this?

Thanks in advance.

I am running Thunderbird vers 127 (I think) on Win 10. When I try to start it all I get is the error -

"A newer version of Thunderbird may have made changes to your profile which are no longer compatible with this older version. Use this profile only with that newer version, or create a new profile for this installation of Thunderbird. Creating a new profile requires setting up your accounts, calendars and add-ons again..".

How do I get back to my profile? All was fine until May 7th when I went on hols but but this happened when I tried to restart on 19th May (so don't think it has updated to vers 128)

Any help much appreciated as this is a complicated profile and would take an age to re-build. (I have got a coy of the relevant profile as a backup)

I have a problem that is probably the same as JG who recently posted here except he describes it a bit differently. When I Send a message it sends correctly. There are NO attachments. I get an error message which is attached. Clicking on Retry, the window closes and nothing is recorded. Click on Save and the Error message re-appears. Clicking again on Save and the window closes but nothing is Saved.

Hello I'm using TB 128 esr / flatpak on Ubuntu 25.04. I'm satisfied, but I want to install Thunderbird in parallel before switching to this version. https://support.mozilla.org/fr/kb/installer-thunderbird-sous-linux#w_changing-channels I read and managed to install TB "monthly beta" by extracting the tar file. It wasn't possible to retrieve the profile via the zip file because it's 2.4 GB. It seems to work, even though it uses quite a bit of CPU power, ~20%!

1/ Anyway, my main interest would be to have a usage similar to Firefox standalone, which I can use from my computer to my laptop :-) with the same profile stored on an SSD data drive. I don't want to install the profile on my computer or laptop system drives!

2/ How do I launch this version at startup?

REgards

I have a new HD and installed Linux Ubuntu 24.04.1 LTS. I installed Thunderbird version 2:1 snap 1-Oubuntu3. The program will not open Just get "Your Thunderbird profile cannot be loaded. It may be missing or inaccessible."

Hello, I am unable to see my email messages in the panel. I do see the number of emails that I have, but unable to open anything. Has something major happened with Thunderbird? The email function was working fine and the next morning, all of my messages in the panel disappeared.

I'd appreciate any immediate feedback. Thank you.

How to make Thunderbird not display the total number of messages, it's driving my OCD crazy, I've been looking for almost an hour and still can't find where to set this.

The version I was using before could put have a layout like this with a simple tweak below: - Accounts - Individual email pane - Message list

I just CANNOT use Thunderbird if I can't do this. How do I do this in Nebula or what version can I revert to? Go to profile folder: Chrome folder userChrome css file Add this: /* puts message page in the middle */

1. threadPaneBox {-moz-box-direction: reverse !important;}

1. I want to put the pane for reading the message in the middle of the layout. I really dislike having to crane my head right all the time.

2. The old css code to enter into Chrome/userChrome.css was:

'/* puts message page in the middle */ threadPaneBox {-moz-box-direction: reverse !important;}'

3. What is the new one? ___________________________________________________________ PERIPHERAL INFO A. I know how to do the rest of it, such as toolkit.legacyUserProfileCustomizations.stylesheets =true B. Change to vertical layout

Contacts syncing Tbird and iCloud appears to be unidirectional: Tbird > iCloud. When I make a change in Tbird contacts (via CardDAV), it appears in iCloud, but changes in iCloud do not effect Tbird contacts. Is this by design? Calendar sync is bidirectional.

Because of extensive travel, I always copy my profile folder from one computer to the other so all the accounts' folders are current--including Local Folders. Every time, things are fine. This time, something is off. I know the stmp setting for each account should show the login password for that account. One account is just fine. The other two change each other so I get an error message when trying to send outgoing mail. When I look at the stmp settings, I see that the password for Account A was changed to the password for Account B. If I correct Account B's setting, Thunderbird immediately changes the password for Account A. To send outgoing mail from either account, I must now check which password shows for both accounts.

I've read everything I can find about anything that seems related to my problem but I cannot find my exact problem.

What can I do?

I can't figure out how to get a threaded view for a conversation in Thunderbird to behave the same as a threaded view for a conversation in Outlook.

1. From what I can tell, the ASCENDING setting works as expected: a) Single messages and thread topics in the selected folder are sorted ascending by date b) Messages within a thread are also sorted ascending.

2. The DESCENDING view does this, which I feel is confusing: a) Single messages and thread topics in the selected folder are sorted descending. For threads, it weirdly uses the timestamp of the FIRST message in the thread instead of the most recent message. b) Messages within a thread are sorted ascending instead of descending.

3. I would prefer the DESCENDING view to do this: a) Single messages and threads in the selected folder are sorted descending. For threads, it should use the timestamp of the LAST message in the thread. b) Messages within a thread should be sorted descending instead of ascending.

Is there a way to get behavior 3?

Thanks!

I have been a Thunderbird user for over 10 years and recently my employer has started switching us over to Google Workspace emails. I'm trying to add the email to Thunderbird, but keep getting a blank gray screen (Image 2) in the Google pop-up after clicking "Allow" (Image 1). No error messages are displayed anywhere in the pop-up or in Thunderbird.

I have tried several times with no success. I've tried rebooting, same issue. I've tried disabling all the plugins in Thunderbird, same issue. I've let the screen sit there for over 20 minutes and nothing occurs. I even tried one-time hitting "Deny" and got the same blank screen.

As it is occurring inside Thunderbird itself, I have no way of telling what is going wrong. I know I am signing into my new Google account successfully as I wouldn't reach the page with "Allow".

Anybody know what I can do?

After update 138.0.1 my profile is not "opening" emails.

I can see that im getting emails, i can see that i can send and make new emails, but the emails when i either click or double click them are "white".

I even tried reading the "source code" it shows nothing. I even tried going to the beta channel, but no avail, the issue persists.

Is there a cleanup, any file to delete? something?