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The summary says it all, really. I've tried all sorts of Google searches and fixes, but nothing works; I was originally on Netscape Navigator, and after Microsoft killed that off, I went to Firefox and Thunderbird - so 'lost in the mists of time ' sums up my problem.

http://oms.zjcashbox.com 在登陆这个网站的时候 输入账号密码 登陆总是显示不正确 但是同事可以在他的电脑上登陆，请问这个怎么解决。 我输入密码点击登陆的时候 密码那一栏 就是感觉自动子输入密码， 我点击看，跟我输入登陆时的密码不一样，请问这个问题怎么解决、 我的邮箱是 [email removed]@hotmail.com 请用这个邮箱联系我

depuis le 10 mars 12 h ma boîte mail thunderbird ne reçoit plus aucun message et je ne peux en envoyer aucun. j'ai un message  : échec de l'authentification lors de la connection au serveur. Mon serveur Yahoo me demande de me reconnecter, ce qui s'avère impossible à faire. Je précise que je n'avais pas touché à mon compte en amont.

My email account is set up with 2fa with an app-specific password for Thunderbird. I manually updated all the info in Passwords, but TB still won't connect. Under Setup it keeps saying "Authentication failed: Check username and password" but both are entered correctly. Under "YourLogin", I have re-entered two different formats but still fails. I also set the SMTP server settings to match email account.

  I've been fighting this for too many hours.  Can somebody help me get connected?

Hallo zusammen, ich habe Mozila Thunderbird im Einsatz. Mein e-Mail-Konto lautet: [edited]@t-online.de.

Seit Ende Januar 2026 kann ich keine e-Mails mehr empfangen. Klicke ich auf den Button "Nachrichten empfangen", erscheint folgende Meldung: Anmeldung auf dem Server secureimap.t-online.de mit Benutzernamen "[edited]@t-online.de" fehlgeschlagen. Über mein Handy kann ich die eingegangen E-Mail ansehen. Warum auf meinem Laptop nicht?

Bisher habe ich noch nie ein Passwort eingegeben. Was muss ich machen?

Im Voraus vielen Dank.

Mit freundlichen Grüßen

Sandra Oberle

I am trying to add one of my Google email accounts to Thunderbird. It brings up the "Sign in with Google" window, which is normal. But instead of "Sign in to continue to Google...", it says "Sign in to continue to Mozilla Thunderbird Email". Which then generates an error: "Error 400. The server cannot process the request because it is malformed. It should not be retried. That’s all we know." I've not ever experienced this issue before; adding a Google account has always been super easy and straightforward.

Has anyone noticed a bug with Thunderbird if you repeatedly click cancel after the desktop app is launched. I decided I didn't want to access the mail box then clicked cancel and was represented with the password entry box multiple times and each time I clicked cancel to exit the app. After a number of repeated cancels, it eventually systematically opened each mailbox that has been unified in Thunderbird. Has anyone else had this experience?

I am trying to reinstall Thunderbird on my computer using Windows 10 and I get a pop-up box requesting to sign in to my Google account and then an authentication error message. How do I get past this?

My new Greenby account was hacked I had to delete thousands of scam emails so my Mozilla account appears to have been blocked. Can I get back into Mozilla or have I been permanently block

This morning I tried to sign in to my Credit Union account. I clicked on my sign-in name, nothing there. I went to my password for my Credit Union account & the entire password manager listing is blank. There are no accounts listed at all. Have someone stolen my information? Did I press something wrong to delete them? I'm 78 years old & not very computer knowledgeable. I have used Firefox for maybe 15 years old & have never had any kind of problem before. Kind I restore this part of my account?

Susan Salowitz [email 1 removed]@msn.com home phone [phone 1 removed] cell phone [phone 2 removed] Gmail account [email 2 removed]@gmail.com

Hi, I have multiple email accounts. To access the passwords there is now a prompt asking for an email and password- some 'identity'.

How do I know/guess what that might be?

v128.14

Thanks David Lawrie

Since 2 days ago, Thunderbird has been asking me to authenticate each of my email accounts. I had done them twice already, but if I have to do it each day, Thunderbird becomes useless to me. How do I resolve the issue? Thanks!

Your windows application just refuses to let me add hotmail accounts, it completed the verification successfully, but then denied access on the final step over an "Authentication error" seconds after confirming that the authentication was fine