Thunderbird Community Forum

Is there any way to communicate with Mozilla ThunderBird  ? It worked for over 10 years, but now won't even Install. Has there been some sort of Sabotage ? Why the strange error messages  ? Continous mandates to change usernames and passwords ?

Welcome to Thunderbird – Enter Your Email Account Password :

       -------------------------------------------------------

Authentication Error : Unable To Log in at Server. Probably Wrong Configuration, UserName, or PassWord.

Email is [edited] @Juno.com Present TextMail is [edited]

/edited email and phone# from public community support forum

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!

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

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

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?

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.

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?

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?

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

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.

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.

I've lost my password, but I believe I have retrieved it from the Profile. The entry reads: "encryptedPassword":"MEIEEPgAAAAAAAAAAAAAAAAAAAEwFAYIKoZIhvcNAwcECOabVSCGHBLGBBiqEqUXu8w7N4eAi09k0ZOIVAcs0chiziM=". Please would you indicate how to decrypt. Promptly upon resolution, I shall obviously change the password using the regular Thunderbird method.

For over a year now, I have had to resort to the Orange.fr e-mail client, which is much less satisfactory. I have used a Demo version of "Passware kit" to seek to retrieve the elusive password, and have received no satisfactory answer from it. I am not prepared to pour good money after bad.

A software solution is only as good as the support the publisher provides for it. Please answer soon.

I emphasise that, as a regular contributor of funds in the past, my continued funding of Mozilla Firefox and Thunderbird depends on your answering with a satisfactory, workable solution to my long-standing plight, contingent upon decryption of the password above.

Adam Warren FRSA [edited from public community support forum] @orange.fr