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I have three email accounts in Thunderbird on my Windows 10 PC which are all with Yahoo. The accounts are ex Sky accounts but are now run by Yahoo.

I am replacing that PC with a Windows 11 laptop so I need to migrate.

I exported the Thunderbird data using the export tool and when I imported the file into the new Thunderbird installation on the laptop I got three pop up messages from yahoo asking me to agree to allow access but they all related to the first of the accounts. I can send and receive from the first account but can neither send or receive from the other two accounts.

I have tried deleting the last two accounts and adding them manually but the yahoo pop up again refers to the first account.

Any suggestions?

After an apparent system-wide aol failure, I can no longer log in to my Thunderbird account. When I open it, the message pops up: "Login to server imap.aol.com with username Leisterr8@verizon.net failed." And it asks for a new password. I looked up my saved passwords and tried to enter them. But that does not work. I don't see how to enter a new password. I am able to log in to my aol.com account with my password. But that does not seem to be the same as the password for the Thunderbird account.

I just started having issues with Thunderbird. When I open it I'm getting the error: Login to server imap-mail.outlook.com with username has failed. I've tried entering my password, no luck. Changed my password and can open my hotmail account in outlook so I know the new password is right, but still no luck in Thunderbird. After too many Retry attempts I get an error in the bottom corner that says something like: the server is offline or may be disconnected (disappears too quick to catch it).

Thoughts on how to resolve?

Thanks, Kevin

皆様、はじめまして。 先日、ThunderbirdにGmailアドレスも追加登録しました。 が、パスワード変更が必要になった為、Google で Gmail のパスワードを変更した後に、Thunderbirdに登録しているGmailアドレスでは受送信出来なくなりました。 従ってThunderbird での Gmail送信エラー画面でパスワードを変更しようとしたのですが「新しいパスワードを入力」への入力を受け付けてくれませんでした。 更にパスワードリストで変更出来るかとリストを出そうとしましたら、Thunderbirdがユーザー名とパスワードを聞いてきました。 でも、ThunderbirdはＰＣが変わっても、ダウンロード、インストールさせて頂くだけで、メールアドレス等の設定をすれば使えますので、敢えてユーザー名やパスワードを登録した記憶がございません？

結局、「その他」を選んだらPINを入れることによってパスワードは見られたのですが。 後でパスワードマネージャーのリストを見てもThunderbird は載っていませんでした。じゃあ、パスワードマネージャーは何というユーザー名を入れたのか？判らず気になります💦

Thunderbird が「メールアドレスのユーザー名」でなく？、単に「ユーザー名」と聞いてきた場合、何を入力すれば良いのでしょう？ 登録した複数のメールアドレスの中のどれかを入力すれば良かったのでしょうか？

その後、Googleから本人確認をしてきましたので、Gmailのパスワードを入れ、スマホで「はい、私です」をクリックしたら、ThunderbirdでもGmailの受送信が出来るようにはなりました。

ただ、もし、Thunderbird ソフトに対するユーザー名とパスワードがあるのなら、なんとかしないといけませんので、お尋ねしております。（初めてThunderbird を使わせていただいた頃のメールアドレスはスパムの為に削除して無くなっております。）

よろしくお願いいたします。m(__)m

I had a shared gmail account for an organization I was involved with for a few years. Last May, that association ended. I deleted that gmail account off of my Thunderbird. I have no associated calendars on my TB. I have no add-ons on my TB. But every ten minutes or so, this message authentication request pops up on my screen, regardless if TB is even open. It's driving me insane. Please help.

I need to fix TB to send/receive/save emails after a power failure today, Grid outage at 13:40, Power restored 13:40. Computer restarted, TB opened but will not perform any send/receive/save tasks. TB Message Send gets Outlook notification - Authentication failure. Went to Outlook email, logged back in, test email I had attempted to send by TB is in Outlook, plus new emails in Outlook, but none in TB. Checked for TB updates, current as of Jan 15, 2026. Restarted computer twice. Outlook email works but TB does not perform any tasks. I lost no TB emails in my messages before the power failure, they are all still in my TB messages. I have Firefox Browser and Windows 11. I love TB. It has had cardiac arrest. Help. Ann

Hello,

After moving my Thunderbird profile to a new computer none of my accounts can authenticate. I followed the instructions here: Move Thunderbird data to a new computer, using "An alternative method for manual transfer between Windows 10 and Windows 11 computers." What explains the response in the attached image, "Something went wrong," and how can I fix it? Happens when I click "Next", the first step to log it.

I have a related problem with other accounts set up in the profile. This one is using Oauth2. I tried switching to password, and hand a similar problem. I tested the connection to the server in Settings for the account and it was successful. Same for the others. They all authenticate successfully on my old computer.

Thanks...

when I view the saved passwords, the saved logins window does not work properly. I cannot drag the borders left or right to view whole information such as passwords or provider. The borders just refuse to move. I therefore can only view partial information under any heading. Please help if possible. Thank you.

Bonjour, j'utilise Thunderbird depuis plusieurs années et j'ai plusieurs comptes de messagerie. Je suis à la version 140.7.1esr. Depuis plusieurs jours, j'ai le message "Saisissez votre mot de passe pour alain.jouenne1@orange.fr". J'ai beau saisir le mot de passe, rien n'y fait. Ma config est Windows 10 64 bits, 3 adresses Gmail, 2 adresses Wanadoo et cette nouvelle adresse orange qui me pose problème. A noter, lorsque j'ai eu cette nouvelle adresse, je l'ai configuré dans Thunderbird et elle a fonctionné. Et puis, un jour, j'ai eu ce message. J'ai même modifié mon mot de passe de messagerie, mais cela n'a pas fonctionné. Pouvez-vous m'aider ? Merci d'avance

I live in Germany and use Deutsche Telekom's T-Online system for my main e-mail system, so my email address is: k.vanleuven@t-online.de

Due to some security problem, I had the change my T-Online e-mail password and since this time I can't send or receive e-mails from my German version of Thunderbird. Thunderbird asks me for the"secureimap.t-online.de" server password, but it doesn't recognize the new password that I have for my T-Online e-mail system.

I store my e-mails in various folders folders in Thunderbird and I want to continue using Thunderbird for my e-mail management.

I think I might have to re-install Thunderbird from scratch. Must I do this, if so haw do I save all my e-maile files?

Your help in solving this problem will be very much appreciated.

Karl Van Leuven

Mozilla sent me passcode # [edited] to create a new password to sign in with on the new browser that I was faced with today wont take it the cose . My name is Darek Shapiro. I need to work today. Want my old browser back

If I cant fix this  My phone # is [edited phone# from public community support forum]

Unfortunately my laptop crashed with windows 10 on it. I have since had it fixed with windows 11 installed. However when I try to sign in to my Sky email account through Thunderbird (imap.tools.sky.com) my password fails. I have signed into my sky email separately (they use Yahoo) with the same password and the same password works fine so I can get into my email account with no problems that way. I am now stuck as I am using the correct password but Thunderbird is saying that the login has failed. So I am asking how can I solve this.

I have been using the Thunderbird email client on my Mac for a long time to access my corporate Gmail account. (This is not a personal Gmail account, it is a corporate Gmail linked with Okta.)

In this corporate Gmail account, I do not have access to "App Password" settings or "Less Secure App Access" options. Everything was working fine until 25th April 25. On that day, I updated my Okta password, which also affected my Gmail account because Gmail is connected through Okta.

Since then, my Thunderbird email client has stopped working. It keeps asking me to allow Thunderbird to access Gmail, and even though I allowed it many times, the same pop-up keeps appearing. To troubleshoot the issue, I have tried the following steps:

• Reset my Okta password again to rule out any password issues. (I am able to log in to Gmail successfully with the new password and I can configure the same Gmail account with the Mac Mail app without any issue.)

• Upgraded the Thunderbird client to version 137.0.2.

• Cleared saved passwords and cleared cookies. (Note: "Accept cookies from sites" is enabled under Web Content settings.)

• Deleted the account from Thunderbird and tried to re-add it.

After this, I started getting the error: "Unable to log in at server. Probably wrong configuration, username, or password."

• While adding the account, I entered my name and email address, left the password field blank, unchecked "Remember Password", and filled in the configuration manually.

When I clicked on "Re-test", it detected the server settings correctly. But when I clicked on "Done", I got the same error again.

• Created a completely new profile in Thunderbird and tried again, but still faced the same issue:

"Unable to log in at server. Probably wrong configuration, username, or password."

• Uninstalled Thunderbird completely and reinstalled it, but the issue still remains. (Please refer to the attached screenshot.)

• I tried the troubleshooting mode, which disables all the add-ons and themes, but the issue is still the same.

Any help would be appreciated.

I'm not sure if this is relevant, but Gmail has made some changes (see the link https://support.google.com/mail/answer/7126229?visit_id=638814378228955739-1844270273&hl=en&rd=1). This might be causing the issue, though it was working fine until I reset my password on April 25th.

Hello

Version 128.5.2 esr.

After starting the program, entering the password and checking the "check box" MT does not remember the passwords for the email account and Google. The password manager is empty. After restarting it is the same.

I didn't have a very specific name (just a set of letters, like AGDFASSFGASD) for the full name for my mail, as I didn't think much of it. But one day, either I logged out myself, or the system threw me out of that mail. I'm trying to recover my mail by trying on the correct password and email, but I don't remember my full name and most likely because of this I can't log back in.

Will any of the moderators be able to contact me via another rambler email so that I can provide the email I'm having problems with? This mail is important to me now. I don't know exactly what happened to the mail, I just can't log in to it.

I can't access to my personal Google account from Thunderbird.

Thunderbird configuration is OK. Cookies authorised.

e-mail account connection process goes this way: - I enter name and e-mail address - I confirm standard configuration found in Thunderbird's FAI database. - Google asks me to confirm that I authorise Thunderbird to share mail, contacts and agenda informations (I was asked my Google pwd only the first time I tried the process). - I confirm my consent - Back to Thunderbirds account configuration window, with "authentication error".

Similar failure when I try to only connect to the contact list or to my calendars (which is my initial will), also from a scholar Google account.

No change after update from 149 .0.2 to 150.0

I had Thunderbird set up using the native icloud calendar function, but today it is asking me repeatedly for my caldav icloud ID and password. When I enter the login credentials, they are not being accepted by Thunderbird. I am using my icloud ID and the app specific password I set up for Thunderbird - but they are not being accepted anymore by Thunderbird. How can I get Thunderbird to accept my icloud login credentials, so I can see my calendars?

Operating System: Windows 11 Computer: Dell XPS 8960

I use SMTP settings

Description: smtp.office365.com Server Name: smtp.office365.com Port: 587 User Name: mypersonalaccout@hotmail.com Authentication method: OAuth2 Connection Security: STARTTLS

but TB is incapable of sending email. Either I got dialog https://software9119.technology/__other/tb/dialog.png or error https://software9119.technology/__other/tb/timed-out.png.

I tried cleaning cache and made some re+/search with no avail. There seems to exist some Authenticated SMTP but this is only available on Exchange 365 while this is my personal Outlook.com account.

Same question had Bill Swartout at 1/9/24, 2:30 PM with no answer, https://support.mozilla.org/en-US/questions/1423404#answer-1629472.