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Hi, since beginning of October 2026 I cannot access my multiple AOL-accounts in Thunderbird under Windows 11. I am prompted to the AOL page, insert PW but at the end: "an error occurred". The PW is valid; I can log in to the aol-accounts on the AOL-homepage.

I already set all methods to OAuth2 and set usePrivatBrowser to true as mentioned in the forum; but it does not work. Any ideas?

Short problem description: Gmail auth is running before the master password dialogue

Long description: When starting up, Thunderbird runs Gmail auth before the master password dialogue. This leads to a failure of the login when the user does not enter the password in time. The access token is not unlocked, auth fails, and a browser window will pop up with the gmail authentication dialogue, necessitating further user interaction and generating extra mails because TB will be reconnected with a regenerated token.

Expected behaviour: Authenticating email accounts being delayed, until the secret cache is unlocked with the master password.

Since updating to TB 153esr from the previous esr, I occasionally get a server authentication error with imap.gmail.com. Most often they happen when first starting up, but occasionally seem to happen at other times. They seem to be transient as gmail works fine otherwise.

Just wondering if this is a known bug?

Hello,

There is apparently a bug in the latest release of Thunderbird, which has broken the callbacks for Yahoo! IMAP email using OAuth. Potentially, it may actually be a problem with Yahoo!, and how https://api.login.yahoo.com is attempting to reopen Thunderbird after logging in, as the process has changed. I've already reverted back to the ESR Thunderbird channel once, but on a recent update the issue was reintroduced. Screenshots are included.

Thanks for any assistance.

I had to reinstall Thunderbird after doing a clean install of Windows 11.

Since installing, the expected login popup for Gmail doesn't appear. I get the attached error message instead.

Yahoo worked fine after a few tries. What is the problem here, and how can I fix it?

I have multiple email accounts on Thunderbird (on MX Linux)... att.net, gmail.com and aol.com

While traveling without my computer, i had to reset my aol password on my iphone.

Now that I'm back at my desk, and being unable to find how to change the aol password on Thunderbird, I deleted the AOL imap account and have tried much of today to add a new AOL account.

In the past, I could create an 'app password' within AOL (browser) and use that password in Thunderbird... but that is no longer working.

Any guidance/suggestions?

I am running the latest Thunderbird version 140.17.0esr (64-bit) available in my MX Linux.

How can I get rid of that horrible bug of Thunderbird prompting me for my login credentials. Already tried the following: re-adding my Email account, reinstalling Thunderbird from scratch. Nothing has worked.

I managed to add one email account, but now is impossible to connect any other, it doesn't matter if it's a gmail or a personalised email.

It says: Authentication error.

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

both give me the same error.

Any advice?

Mozilla Account works normally directly inside Firefox, but logging into Mozilla Accounts through Thunderbird's Add-ons manager fails during the Firefox handoff.

Steps to reproduce: 1. In Thunderbird Add-ons, click Log in. 2. Thunderbird redirects to Firefox, showing "Continue with Mozilla account". 3. Click Continue -> Firefox displays "You could not be logged in. Please try again."

Troubleshooting already tried:

• Created a brand-new Thunderbird profile (thunderbird -P) — same failure occurs.
• Cleared cookies/site data in Thunderbird and cleared Firefox cache.
• Disconnected existing Thunderbird/Add-ons connections from Mozilla Account dashboard.
• Extensions and add-ons themselves install and download normally.

I'm using a mailbox.org account with TB. I'm receiving messages from it, so I'm logged in, but TB keeps asking me every so often to login again, and it has three popups in a row each time. How do I turn this off?

I have installed Thunderbird on Linux on a chromebook. When I try to add my (gmail) email account in the Thunderbird account setup screen, it hangs up trying to authenticate the Google password for the gmail account. I have scrupulously checked and rechecked the password and the server details, and they are all correct. Why won't Thunderbird accept the password for my gmail account? Or is something else not right?

I set up thunderbird exactly the same as on my old computer -- i cannot retrieve my emails on the new computer even though the test connection was successful - but i get a pop-up saying autentication failed when i try to get my emails on my new computer, Old computer still gets them

2026 09 07

Mozilla Support.

Dear Sir,

I have operated my email

redacted@malcolmgmiller.biz

for many years.

I have forgotten my password and been unable to receive or send emails for some time. I do not know how to access the change your password page without knowing my password.

I do have my customer number but that did not grant me access.

Please assist me in reestablishing my account.

Yours faithfully,

Malcolm G. Miller.

redacted@malcolmgmiller.biz (Not operational) redacted@aol.uk (Standby email account)

I do not need to write much. My passwords in Google, Microsoft, etc are all in Ibo language (NIGERIA) and no one can decipher it. I have been using them for 15 years, now Mozilla wants me to change it. No, It will never happen. That language is another level of protection. Bye for now.

I keep getting "authentication error" when adding a new email account with Infomaniak, even when I use the app generated password. I am not having this problem with Outlook. I cannot disable Account Hub (1 suggested solution) in Thunderbird 157. what to do?

At one time, I was able to access my email with Thunderbird. Then Thunderbird stopped working, and I didn't have time to research why. Monday, I bought a new Macbook. After installation, Thunderbird says "account settings found." Then it asks for a password. My password no longer works. Instead, I get a message: "Authentication failed. Unable to log in at server. Probably wrong configuration, username or password." What, if anything, can I do?

I have been having all my email transferred from Yahoo mail for more than a decade, it used to be Frontier net, and i didnt want to change my email, and i havent, so i transfered it on 3 devices because i am very used to the thunderbird format. It still works on my android phone and my HP laptop, but thunderbird will not allow me to sign in to yahoo mail on my PC which is what we use the most for our email, for some reason yahoo made some changes and required a new sign in so i did that on the other 2 devices, however, when the sign in box from yahoo pops up on our PC it always says " OOPS something went wrong" and i called yahoo and they verified it was not them. Which leaves Thunderbird to fix the problem. Please address this as i still Do Not want to change my email address or the Thunderbird Mail which we are used to. Some things are okay just as they are, so i would like some help from your end. Thank you, Richard Sessums.

Thunderbird is not asking me for my password for the following addresses - [edited]@consultant.com , [edited]@mail.com and [edited]@mail.com

Security Settings are as follows for the above

Connection security : SSL/TLS

Authentication method : Normal password