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I recently set up Thunderbird on my android phone and managed to finally connect my iCloud email to both mobile and desktop (didn't realize i needed two different passwords for each).

After a few weeks of it working fine, I'm now being notified of some authentication issue for mobile. Does this mean I have to re-do the app specific password again? Will this be a consistent thing I would have to do for my iCloud? Don't need to do this for any other email I have set up through the mobile app.

Anyone know of a solution for this? I'd hate to continuously need to revoke and create a new password for just this email address.

Guten Tag

Das E-Mail-Programm meldet immer „Passwort falsch“ oder GMX verweigert den Zugang? Komisch ist nur, dass es nur mit ihrem E-Mail-Programm so ist. Das Programm bekommt keinen Zugang, obwohl das Passwort ok ist. Alle Programme funktionieren, nur Ihres nicht. Auch eine Neuinstallation hat nicht geholfen. Seit heute kann ich keine E-Mail bei allen Konten mehr abrufen, da bei allen Konten die Passwörter falsch sein sollen?

Kai Ockenfuss

Thunderbird ver 115.18.0, on a Win7 machine, upgrading not an option

When opening Thunderbird I get a sign-in message, inserting my email address and clicking the next button I get the google error message.

‘I can login to Orange website & read my mails: Thunderbird, using same password, gets "Authentication Failed", This on 2 accounts.’ for ‘Thunderbird’. This is a recent problem, occuring after a series of"Account blocked , due to suspicious activity"

Out of the blue Google started blocking one of my Gmail accounts on Linux Mint. It's been running fine for months. The rest run fine. It kept giving me this error message.

400. That’s an error.

The server cannot process the request because it is malformed. It should not be retried. That’s all we know.

I installed that account on my windows box with exactly the same information. I cut and pasted it in fact. It went right through with no problems.

It's one of my main accounts and it's dead in the water. I deleted it and tried to reinstall it and I have exactly the same problem. Setup information. Hit continue. "Configuration found" Click done. Goes to "Sign in to continue to Mozilla Thunder bird Email" Put in email address. Click next and I get that error message. Help?

Captain Quack.

I changed my password in my Juno account and have logged in via a browser with the new password several time. But Thunderbird attempts to connect continue to fail. I deleted the old password in Thunderbird in the Privacy & Security section thinking it would update when the new password works - unfortunately, it never works. I reviewed all the Juno settings in Thunderbird and they are all consistent with the Juno Support recommendations. Now what?

I have successfully added five ntlworld.com email accounts in Thunderbird but my two personal ones keep coming up with Authentication error. Each time the screen shows the details of the account found automatically so the information is coming from somewhere.

Advice I gratefully received was to Disable the account hub in Settings / General, then add the account from New Account, and use an application specific password assigned via your email provider.

Virginmedia no longer seems to acknowledge ntlworld accounts but says they are talktalk. However, talktalk says they do not hold the accounts.

I do not understand how I can disable the account hub in Settings when it has not loaded.

I cannot understand why two of the accounts do not load.

Good morning, I had a working VPN installation Fedora 44 XFCE Flatpak org.mozilla.vpn. But this morning when opening Mozilla VPN it " hangs" at: waiting for sign in and subscription confirmation

How to fix?

Fedora 44 XFCE Flatpak org.mozilla.vpn 2.39.0 stable.

Yours kindly, Roel

I am trying to add an email address to Thunderbird on my laptop and I keep getting an authentication error when I enter the password. All the same information has been used for the same email address on my phone and works fine.

Can't sign in or change password. can't get mail or send. I have email through Yahoo. (Comcast.com) The below message pops up all the time.

Login to server imap.mail.yahoo.com with username xxxxers@comcast.net failed.

my email [redacted]@comcast.net

T-Bird's pop-up window requesting password keeps popping-up on my screen every 15 to 30 minutes or so ALL DAY, regardless of whether or not I fill-in the password or cancel the po-up. No idea how to make the sun-on-da-beach stop! PLEASE, anyone that has experience w/this... HELP!!!

trying to set up a second email address, when asked to summit a code to verify to the new address, cannot comply because i have no password for the new address. how can i verify the code to set up the new address? the new email address

Hello,

I'm having an authentication issue with Thunderbird on Fedora when trying to add a second Microsoft account.

My main @outlook.com account works without any problems using IMAP/SMTP and OAuth2. However, I can't get my @outlook.fr account to work.

For the @outlook.fr account, I'm using:

IMAP: outlook.office365.com, port 993, SSL/TLS, OAuth2 SMTP: smtp.office365.com, port 587, STARTTLS, OAuth2

When I add the account, the Microsoft login page opens normally. I sign in with the @outlook.fr account, complete 2FA, and Microsoft confirms that the account has been successfully connected to Thunderbird.

However, as soon as I return to Thunderbird, I get an authentication error saying that it was unable to log in to outlook.office365.com with that username.

I've already tried clearing Thunderbird's saved passwords, cookies, and web cache. I also confirmed that IMAP is enabled in Outlook web settings, checked the account aliases/sign-in preferences, and verified the server names and ports.

Since the Microsoft authentication itself completes successfully, I'm not sure why Thunderbird fails immediately afterwards. The same setup works with my @outlook.com account, so the problem seems to be specific to the second account.

Has anyone encountered this before, or is there anything else I should check?

Thanks.

Dear Thunderbird Support Team,

I am unable to log in to my email account through the Mozilla Thunderbird desktop application. I am getting an “Authentication Error” stating that Thunderbird is unable to log in to the mail server and that the username, password, or configuration may be incorrect.

However, I have verified that the same email credentials are working correctly through webmail, so the account password is valid and the mailbox is accessible.

Issue Details:

Application: Mozilla Thunderbird Desktop Issue: Unable to authenticate/login to the email account Error: “Authentication error – Unable to log in at server. Probably wrong configuration, username or password.” Webmail Login: Working successfully Thunderbird Login: Failing with authentication error Operating System: Windows

I have already checked the email credentials and attempted to configure the account in Thunderbird, but the issue persists.

Kindly help me identify the cause of the authentication failure and provide the correct Thunderbird configuration/settings required to access the email account.

I can provide screenshots and the current Thunderbird account configuration if required.

Thank you for your support.