Thunderbird Community Forum

Hello all,

Following some changes in our organization, we had to create new email addresses with new domain names. We have kept the old ones until now but we decided to erase some that had not received emails for a while.

Since we did that, we have encountered some problems regarding one of our computer. We can't send emails because Thunderbird is asking us for the passwords of the deleted email accounts. When we click on cancel, a window opens saying (roughly translated from French): "The email could not be sent. Authentification to the SMTP (outgoing server) failed. Please verify your password and the "Authentification method" in the "Account parameters | Outgoing server (SMTP) menu." The email was sent from a completely different email address than the one linked to the email account.

We deleted the accounts and cannot access this menu. Has it happened to anyone? What would be the solution to be able to send email again on that computer?

Many thanks for all your help, Please ask me if you need anymore information All the best

Ich habe mir heute das Programm installiert und beim Einloggen werde ich nach meinem Namen, meiner Emailadresse und nach meinem Emailpasswort gefragt, doch leider wird mir immer ein Fehler angezeigt! Ich habe jedoch alle Daten auf ihre Korrektheit überprüft und kann keine Fehleingabe finden.

I use Thunderbird v 140.12.1esr to manage email on my email account X@yahoo.co.uk. For the past 2 days sent emails fail with error message "sending of the message failed. The message could not be sent because connecting to outgoing server SMTP.mail.yahoo.com failed. The server may be unavailable or is refusing SMTP connections. I have not changed my smtp settings - they are Server = smtp.mail.yahoo.com; Port = 465; user name = X@yahoo.co.uk; Authentication method = OAuth2; Conneciton Security = SSL/TLS

(PII redacted by moderator)

I am on release 140.12.1 esr and there appears to be no new updates available. If so, what release should I be on and can I just download and install to get back on the latest release

My wife has a computer that hasn't been used for about 7 years and it contains a lot of emails that she would like to have on her newer computer.

The older computer has an older version of Thunderbird which doesn't allow the Importexport ng extension to be added.

Although I've copied her old profile, I can't see how to extract the emails from it into the newer version of Thunderbird on the newer computer. Is it possible and if so, how please.

Thanks.

Hi - I am running Thunderbird release 140.12.1esr (aarch64) on a desktop Mac runnning Sequoia 15.7.3.

Thunderbird is set up to take addresses from my personal address book. When I bring up Collected Addresses in the Thunderbird address book, there are no email [or any other kind of] addresses listed. Absolutely nothing in Collected Addresses within the Thunderbird address book.

There are 21 email and other addresses listed in my Mac OSX address book. When I search my stored email messages, Thunderbird brings up each and every address that matches the string in my query. The matches appear to go back more than twenty years.

I have searched the web on how to clear the autocomplete cache. There appear to be several different methods. I have tried bringing up the matches via the string and the resulting query, and then scrolling through the matches with the down arrow key. When I reach an address I would like to remove from the autocomplete cache, I have tried clicking on various combinations of keys. These combinations include:

1) Shift + Delete keys 2) Option + Delete keys 3) Command + Delete keys 4) Option + Command + Delete keys 5) Just the Delete key

My intuition tells me the autocomplete cache must be stored somewhere in a file. I cannot conceive of the autocomplete cache being maintained across versions, hosts, etc. over a period spanning twenty years without getting stored in a file.

Please enlighten me on how to clear out the junk email addresses in my autocomplete cache.

Thanks in advance for your help.

Regards,

Corwin

Hello,

I'm looking to customize the colour of the message header row (the part highlighted in red; with a black background as shown in the screenshot) to #202020, to match the rest of the elements of the view. While I've successfully managed to customize other elements (code below), I need help with identifying what to specify for the message header row.

.tree-table { background-color: #202020 !important; }

treechildren { background-color: #202020 !important; }

#messagePane { background-color: #202020 !important; }

#messageHeader { background-color: #202020 !important; }

#msgHeaderView { background-color: #202020 !important; }

Thanks and cheers.

I just added two new email accounts to my Thunderbird installation, which has been working with three accounts flawlessly for years. All my accounts are POP/SMTP.

Both the new emails are Google Workspace accounts for an in-home business. One uses (my) name@(domain) as the account name, the other uses info@(domain). The account using my name works fine, sending and receiving. But the info@ account does not display a Sent folder, and will not send messages. It looks as if it does, but they never show up. I checked the Account Settings and the two new ones are set up identically, and just like the other accounts that have been working just fine. Any ideas? Many thanks in advance.

On Saturday morning 27 June 2026 I tried to login my Orcon email account via Thunderbird (which I have been using for a long time). But my login didn't work, I got a message saying "login to POP3.orcon.net.nz with username habitation failed." On 30th June 2026 I reported the problem to Orcon.

Orcon gave me the following settings for Thunderbird. I have done that and even made a new account: Incoming Server Type: IMAP Mail Server: imap.orcon.net.nz Port: 143 SSL: Off Authentication: On (username and password required)

Outgoing SMTP Server: Mail Server: smtp.orcon.net.nz Port: 25 SSL: Off Authentication: Off

Since then I have spent many hours and going around in circles with Orcon's Technical Support to resolve this, but no luck. They blame Thunderbird. I used Thunderbird Troubleshoot Mode. The message that comes up reads: login to server mail orcon.net.nz with username habitation failed. Please can you check that your server settings above are correct? And if there is a bug? Irma

I've asked this question before, but have gotten no response. Maybe I'm not explaining it clearly enough. I will try again. When I name a new file folder, how do I get it in the correct alphabetical order? I end up making it a subfolder in under another incorrect folder or it does not get in correct alphabetical order. I hope this is clearer to understand. I just don't know how to make it any plainer. Thank you for your kind response.

Since Thunderbird update to Snap ``` 140.12.1esr (64-Bit) Mozilla Thunderbird Snap for Ubuntu ubuntu-snap-build - 1.0 ``` opening attachments ceased to work. What does NOT work (any more):

• Move mouse over attachment → right mouse → open (nothing happens)
• Move mouse over attachment → right mouse → open with (doesn't exist)
• Move mouse over attachment → doubleclick (nothing happens)
• Settings → Attachments → There is an empty box, and in the void beneath it, floating in empty space the text (backtranslated from DE): "Add a Filelink-memory service" or "Filelink-save service" or similar. The text is dead (not clickable), same for the empty box.

AFAIR, in the good old non-snap TB version, the box had file extensions and linked applications to open them. The box / links / extensions coud be added, edited, removed. But in snap crap it's all dead...

Any hints what I am missing?

I used to open attachments from received mails (like .diff, .patch), and also used it for final inspection of own attachments while composing mails.

Sometimes, the following message opos up: /run/user/1000/doc/1d06e601/binutils-sort-text.diff konnte nicht geöffnet werden, weil die damit verknüpfte Hilfsanwendung nicht existiert. Ändern Sie die Verknüpfung in Ihren Einstellungen.

I've used Thunderbird for years. computer crashed and I'm trying to install Thunderbird on my new PC. Thunderbird cannot find account. I've checked with my provider several times and all settings are correct. Any ideas? I've also downloaded installed and uninstalled 5 times today with the same result.

I want to auto delete all msgs from a specific sender. I want to create a filter which will delete them so I won't see them at all (auto deleted). I tried to create one but could only move the messages frm the sender to the spam folder. But I don't even want to see them there. I want them gone automatically.

How do I do this?

When I was cleaning up my folders in inbox, I moved a folder and all of the emails and sub folders disappeared. When I open it in troubleshooting mode they are there. What should I do?