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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.

The security sequence for log-in is supply of user-id and then password; that works fine; then a send unique code dialogue pops up and it leads to an error screen which I am attaching. I have rung the number provided and they say they don't support Firefox; so that looks like end of Firefox use to me and goodbye (can't find a tearful emoji to insert).

Gotta say this kind of thing is happening quite frequently for me; mostly without a nice error screen like this one; last one I recall was hunting for car insurance; on the screen where it listed the billions of quotes to eager providers none of the links to click through for the quotes worked... and with this happeneing more frequently now you go... ohh it's firefox again isn't it... so you reluctantly fire up Google Chrome and of course it works OK.

So I'm kinda here with a broader outlook than just this specific problem; I really am on the verge of giving up with Firefox; it should just work shouldn't it; and it increasingly doesn't anymore; I don't want to get into an extended and convoluted dialogue to help you cure this issue; I'm simply perplexed that some really basic stuff doesn't work anymore; however; I've used Firefox for centuries so thought I should give you at least a chance so I could declare how I feel etc.

I am up for a dialogue over this and hoping this is an easy fix; but; as I say; I'm confused as to why, for me, Firefox just simply doesn't work well anymore; it just should and I shouldn't be here.

I have Thunderbird 128.2.3 (32 bit). I have set Server type IMAP mail server, then Server Name to: outlook.office365.com and Outgoing Server: smtp.office365.com I have OAuth2 on both. When I enter, I get a new Thunderbird input that requires a password. My password does not work, the therefore my email account does not work.

I have confirmed that my Outlook Password is correct. I have cancelled my Outlook passwords. I have installed the 2 step verification option.

What needs to be done so I can use Thunderbird on my PC Win 10? Thank you, Ed

I transferred Win 7 Thunderbird Profile (TB)to a Windows machine. It left behind all the other settings, such as when picking up/sending email, passwords are required at the IP to login, get email/send email.

QUESTION: Is there another TB area where the passwords are stored so I can copy those over to the new computer.

I posted this about a week ago, and when I come back, it's gone. That's why I am repeating myself.

A long timer ago, I was told by a user that Thunderbird does not need passwords. It does if you what to get your email. They are setting for each email user. There are 34 under the one TB.

I hope there is a transferable file because changing all the passwords and preference for each account would be the hard way.

I appreciate your taking the time to read this,

~r

I've followed Thunderbird setup according to "Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication" (https://support.mozilla.org/en-US/kb/automatic-conversion-google-mail-accounts-oauth20) The failure is described in my initial post below:

Mozilla Support - Signin, and use of Thunderbird https://support.mozilla.org/en-US/questions/1484529#answer-1729438

LarryGad post (Reply to Ashley LambertonQuestion owner): I get the same screenshot Ashley posted above. But...clicking Allow doesn't download my Gmail messages. And clicking the link, Account Permissions, just produces a blank window. An idiosyncrasy is I'm the domain administrator for a "Free Legacy Edition of G Suite for personal use".

This paragraph may not be relevant to the above issue. I did stumble across the Account settings link (https://myaccount.google.com/general-light?pli=1) which contains the line: 'Connected accounts View and manage your accounts from other services' Clicking the 'View ...' link goes to https://profiles.google.com/connectedaccounts and displays the message: "404. That’s an error. The requested URL was not found on this server. That’s all we know." Highlighting the 'View ...' link shows https://profiles.google.com/connectedaccounts?authuser=0

Thanks in advance.

I have multiple gmail accounts set up on Thunderbird. They were all working fine until I traveled overseas and came back. Then, all of a sudden, 1 gmail account stopped working. The rest kept working fine. I checked the settings and they were correct. I removed the account and tried to set it up again (about 10 times), but kept getting the same error message: "Unable to log in at server. Probably wrong configuration, username or password." The automatic configuration passed and I even tried manually configuring to the recommended settings to no avail.

The only thing I can think of is that when traveling overseas and trying to get online, Thunderbird and/or Gmail asks for further security verification, and I just avoided using Thunderbird altogether while abroad. Upon my return, I started getting this error message. It is extremely inconvenient to have to use the Gmail interface for only 1 email (my main email!). Does anybody know anything I can do to repair this? I'm almost tempted to use another email client altogether to make my life more efficient as the new setup is not sustainable.

I DON'T want my email account password to be saved anywhere in Thunderbird and I DO want to have to enter the password each time I start up Thunderbird anew. However, my password is being retained. I've deleted the password entry from Settings & Saved Passwords but seem to have to do that every time before I close down. Where/how can I ensure I have to enter my hotmail password each time I start up Thunderbird please?

Something changed a few weeks ago (about November 30) and since then Thunderbird will not allow me access to any new emails, nor to be able to send new emails.

Instead, I get a large pop-up window which basically says "Enter credentials: Mozilla Thunderbird Email wants to access your Google Account <my email typed here> This will allow Mozilla Thunderbird Email to: Read, compose, send, and permanently delete all your email from Gmail".

I don't want anyone to permamently delete any of my emails, nor do I want anyone sending emails from my email account (etc, etc).

SO I click deny, and the pop-up goes away - that is until I try to use Thunderbird and it pops up again.

I've been using Thunderbird for many years and never had this problem before. Do the Thunderbird or Mozilla techs know anything about this and how do I fix it, or is it a new policy (which means I will no longer be using Thunderbird)?

I have searched here some time in December but nothing suggested by other users worked for me.

I have downloaded the latest Thunderbird (for Windows). I have tried setting up my Gmail account in it but just get a failure. Not sure what I am doing wrong.

I start the account setup, set my email address and password and click continue. It shows an automatic IMAP configuration, I click Done. A window pops up from Google for me to allow Thunderbird to access my Google Account. I click Allow. The window goes away and It goes back to the account setup screen with a yellow error box saying "Unable to log in at server. Probably wrong configuration, username or password."

I know my username and password are correct. Any suggestions?

MS changed authorization method and now it require protocol OAuth2. I've changed my account for two layers authorization and tried change Thunderbird configuration due https://support.mozilla.org/en-US/questions/new/thunderbird/form but it not works. I can't connect. I've no problems to connect with Outlook and standard mail app for Win2010 or using BlueMail on android. Ive Thunderbird v. 115.11.0 (32)

Can You help me? I'd prefere to stay with Thunderbird.

Maciej Garnysz

I've read everything apropos here, tried everything, and I'm lost--and totally screwed--if I can't get into my old Thunderbird. Spectrum, computer died, nobody competent here to get past "Registry Error," I guess, but I need all the data, contacts, calendar, etc., in the T'bird I've relied on for MANY years. PLEASE help. I tried to get a screen grab: It didn't work.

This is the second time I've appealed for help.

Hello I keep getting the attached message to sign into Thunderbird with my Google account as per the attached image. It is only recently that the message keeps appearing which is very annoying. I have tried various settings but nothing seems to work. What can I do to get rid of this message? Thanks

I tried searching for the answer here but didn't really find it. With more and more places going to Passkeys over traditional passwords, how does that work with Thunderbird? It's not like we have the typical login credentials to setup under the account settings.

Thanks

I removed Gmail from my Thunderbird after Gmail became unreliable. (I had Gmail coming through T-bird for many years with no hassles..). I then attempted to re-install the Gmail client in T-bird using Gmails directions. Gmail took over my Thunderbird account! I then removed the Gmail account completely... I now get a notice in Thunderbird to sign in with GOOGLE after all my T-bird imap access is done and Tbird is open. The page (Google notice) which appears asks me to sign in with Google account. I want to get rid of this annoying notice. The notice can easily be dismissed but it is really annoying when it appears every time I open T-bird. Any ideas or help much appreciated! ..Btw - I attempted to get help from Google and they dismissed my case saying it was contrary to their policy etc....!! Help!

Hej. Jeg har Thunderbird på en anden pc med den samme kontooprettelse/indstilling som jeg har brugt på en ny pc. Den siger indstillingerne til server er fundet og jeg siger fortsæt. Efter lidt tid kommer en besked - brugernavn eller kode er forkert. Jeg har tjekket flere gange og alt står korrekt men stadin fejl om forkert brugernavn eller kode. Bruger windows 11 home alt er opdateret Bruger Avast

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Hi there Thunderbird Community,

I am first time user of Thunderbird, and I am using version 140.2.0esr (64-bit).

I have been trying to connect my Gmail account, and it keeps on giving me this error that I have seen on other threads: "Unable to log in at server. Probably wrong configuration, username or password."

From the other threads, I tried to do the troubleshooting suggested:

 - cleared the cookies associated with Google
 - added https://account.google.com as an Exception for Cookies and to always allow
 - disabled Account Hub since it seems to have issues from what I read on another thread
 - changed my Google account password
 - tried another Gmail account with no success
 - tried various Thunderbird versions, uninstalling the old one before reinstalling the new one:  Thunderbird Release (Recommended), Thunderbird Extended Support Release (current version being used), and Thunderbird Beta.  I have not tried Thunderbird Daily.

I have added Google OAuth screen-by-screen images of what I saw before getting the Thunderbird client error message.

Any ideas?

Thanks! James