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Hi, I'm having issues moving a 10 year old Thunderbird installation on a Windows 10 Pro computer to a new Windows 11 Pro PC.

I looked at all the guides & prior support messages and followed the instructions carefully. My old Windows 10 installation was in a custom directory (G:/Program Data/Thunderbird). I ensured it was updated to the most current version and closed it before moving files. I installed Thunderbird on the Windows 11 machine, went to Troubleshooting Info and found the folder that it used for the profile (when I go to profile editor, there are 2 profiles listed in the new build - I verified that I was in the directory for the default profile). I then closed Thunderbird on the new PC.

The two computers are on the same network so I moved all the files from the old location to the new location via just drag and drop. Of note, I couldn't "go up 3 levels" on the original machine's directory as per the instructions because, well, there weren't 3 higher levels of directories - I just moved the Thunderbird to Thunderbird on the new PC.

When I open Thunderbird on the new PC, it still acts like it's a new installation, except I do have my Address book. I tried deleting the second profile it had created; no different. I tried creating a new profile and specifying a directory somewhere else (eg. C:\Program Data\Thunderbird) and moving the files there - no different. I tried copying (presumably inactive) Thunderbird folders from the old computer C:\Users\~\Roaming and \Local over to a similar location on the new PC - nothing changed.

Anybody have any other ideas of what I'm doing wrong? Thank you!

I started getting error messages to say that my account was rejected at the server, This happened on all my email accounts. I obviously checked that the configuration of the accounts was correct although they had been working previously. I removed my VPN and Firewall, removed the app and deleted residual data and then re-installed. I still have the same/similar problem, when i try to add an account i get a message saying "Unable to login to Server, probably the wrong configuration, username or password" All of which have been checked multiple times.

Hello, I've just installed TB on a new computer (Windows11) and followed the directions given on https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer to move data from the old computer to the new but when I open TB on the new computer it simply creates a new profile instead of the one I've copied into the C:\Users\...Appata\Local and \Roaming folders. What do I do to get TB to use the copied profiles? Thanks.

I just installed Thunderbird on a second computer and I'm having serious issues with my email. The install recognized me without having to log in with my password. However almost all the emails are missing with the exception of one folder called Trash. There is nothing in the inbox and no sub-folders are showing. I logged out and then reopened Thunderbird and again it opened without asking for my password. It's very strange and alarming quite frankly. Everything worked quite well on the first computer so what gives with fiasco? Unless somebody comes up with a solid answer and fixes this, it will be the last time I use Thunderbird. Patrick

Hi, after an update, i have the newest version of Thunderbird installed. Upon starting, it says: "Unable to use profile when you launch an older version of Thunderbird." I cannot start the program. But it is the newest version... What can I do? Thanks Lukas

Dear All,

I think that is a compability problem of Citadel with Thunderbird email client.

After several steps to try to solve the problem I found that Citadel is not compatible with the last version of Thunderbird.

I tried Linux (Centos 9) and Windows Thunderbird. I tried my affiliation network and with my mobile hotspot.

I can send emails with my Android email client.

I am thinking to make a downgrade of Thunderbird. I have there all my emails from always.

But first I have to backup everything of Thunderbird. Time consuming task.

Some help is needed.

Luis Gonçalves

Having just re-installed Thunderbird I receive the following error message when trying to set up my gmail account, which had been working fine before

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.

The password is correct as I can login from my browser and I have easily setup my other email accounts - not gmail. Also have re-started PC and Thunderbird.

Help please, regards, Haydn

A new version of the "List All Tabs" appeared on my toolbar today, shown on the left and hovered over in the attached screenshot (ignore the Malwarebytes extension icon). The old icon for this button was a chevron with approximately the same functionality. I was able to remove the old icon, but I'm unable to find a way to remove this one. Here is what I've tried so far:

• Like the old one, the Customize Toolbar feature is unable to remove it since it is grayed out.
• For a while, I was able to remove the old icon by going to about:config and setting browser.tabs.tabmanager.enabled to false. This solution does not work for the current and some recent versions of the button.
• I attempted to create a userChrome.css file (following all the steps according to this this website) and added the following string: #alltabs-button { display: none !important; }

None of these attempted fixes have removed the button following a browser restart. Is there a way to remove it? I have no need of a button that shows me what tabs I have open when I can simply look at my toolbar.

I have a IP intercom that only works with Firefox 127.0.2 Now Firefox automatically upgrades to the latest version and I'm unable to prevent this. I'm unable to manage my intercom with the latest version. How do I turn off automatic updates.

I just upgraded to 128.2.2esr and cannot receive or send messages after the update. I have restarted the computer and tried again - still nothing. I'm unable to use a tool that is critical for my daily needs.

Trying to send just says "Connected" or "Sending" but never completes. Worked fine before the update which was just in the past hour or so.

Same issues with downloading new email or sending email for all accounts. :(

Anyone else having problems? Ideas?

Thank you!

Hi,

I am running Thunderbird 128.2.0esr (64-bit) on Ubuntu 24.04.1 LTS

Since around the beginning of September, I find that my Local Folders, which still seem to be storing new emails ok in Thunderbird, are no longer mapped to my "~/.thunderbird/<profile name>.default/Mail/Local Folders" directory tree.

Thunderbird seems to have changed its behaviour in this regard around the start of September.

Has anyone else experienced this?

Any idea where the "Local Folders" emails might now be stored on disk?

I converted as advised and then updated to the newest version. I lost everything except the messages: the Address Book, Tags, Message Filters, and Folders are all gone. This is a disaster after 15+ years with Thunderbird. It started when I copied the folder "profiles" from my laptop to my PC for the 1,000th time. Is there a simple step-by-step solution? Without the history or apologies etc. etc? Just "do this?" My solution now is to do all my email on my laptop. Ugh!

After auto-update to v128.2.3esr all my rss-feeds are broken. The main rss-folder Account Name has changed to "server8.invalid" and all contained rss-feeds are colored gray and are unable to fetch new messages. How can I fix this?

I was automatically updated to 128.2.3esr (64-bit) and immediately I have lost the ability to create new subfolders in any part of my folder tree or on any of the accounts I use. Rt-click -> New Subfolder has always opened a little dialog box to name the new folder. Now nothing happens. I have seen a similar user issue reported, but the answer was long and incomprehensible and seemed purely to relate to spam boxes and certain user account types . The issue is still not marked as resolved and is a real pain. Is there a simple way to roll back to the last version while you figure it out?

Best Regards

Peter Rose

I have a Mircosoft live.com email account, using Thunderbird 128.2.3esr as my email app on a home computer running Win10. Got emails from MS about updating to OAuth2 authentification. After changing to Oauth2 in Server Setting Oauth2 would not show up in SMTP server (could receive but not send mail). Following MS instructions I deleted my account and added it back (apparently a big mistake). After a lot of hassle I now have Oauth2 set up on both Server and SMTP & can receive & send email, but I can not see my folders, only the default Inbox, Sent, Trash and Local Folders - Trash & Outbox. View/Folders has "All Folders" checked (& it is grayed out). I had dozens of folders with probably thousands of emails. If I go into my TB profile I can drill down and see the names of folders that were added in the last couple of months, so I think the folders are still in my profile where they should be. Any ideas on how to see my folders?

Hello, I have a new installation of Thunderbird (128.2.2esr (64-bit)) and am unable to discover how to set it to spell check in French. I've installed Grammalecte as suggested and then restarted the programme. However the only language option is English US.

Can you help please.