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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 have no way to log in to my google accounts right now. On any google site, if I hit log-in it redirects me to this page:

https://support.google.com/accounts/answer/32050?hl=en

I've tried clearing my cache and cookies. My firefox browser is up to date. I tried disabling ad blocker and cookie auto-delete. Javascript is enabled and I even tried turning on that feature that prevents page redirects. I'm truly at a loss for what to do.

I just changed phones and providers. The provider transferred all data to the new phone, but Firefox and Firefox Focus did not transfer, and had to be reinstalled. I stored my passwords on Firefox and can't access them on my new phone. It keeps telling me to log in on my computer, but the only computer that was synced was lost or stlen a year ago while I was hospitalised for major surgery. I reported this to Mozilla at that time. I just need to access my passwords on my new phone. HELP!

I need to fix TB to send/receive/save emails after a power failure today, Grid outage at 13:40, Power restored 13:40. Computer restarted, TB opened but will not perform any send/receive/save tasks. TB Message Send gets Outlook notification - Authentication failure. Went to Outlook email, logged back in, test email I had attempted to send by TB is in Outlook, plus new emails in Outlook, but none in TB. Checked for TB updates, current as of Jan 15, 2026. Restarted computer twice. Outlook email works but TB does not perform any tasks. I lost no TB emails in my messages before the power failure, they are all still in my TB messages. I have Firefox Browser and Windows 11. I love TB. It has had cardiac arrest. Help. Ann

How do I update the SMPT server password in Thunderbird. Updated IMAP pw and system receives email fine. Cannot send messages, "Outgoing server (SMTP) error". SMPT password needs update.

I am not able to login into my gmail account. Whenever I try to sign in, it shows the message as shown in the attached image. I have tried clearing all cookies and cache. Also removed all the extensions to see if it fixes it Please help me. I have Linux Mint 22 Cinnamon Firefox version 131.0.3 (64-bit)

I cannot change my email address to my new email address.

When I try to follow the primary email change procedure, after entering my new address, I receive a message: "that account already exists."

My new email address is: [edited] @gmail.com My old email address is [edited] @aol.com

I no longer have access to my old email address [edited] @aol.com which changed years ago.

I have never had any identity confusion with my current gmail address, [edited] @gmail.com

This situation may have happened from my previous attempts to update my primary email address. Could you send me a verification code to [edited] @gmail.com so that I can resolve this situation?

Thank you.

David Durand cell [edited phone# and email from public community support forum]

my password. I did it and now I have to update my various programs and apps to the new password to access my emails, but the Thunderbird mail program that runs on my smartphone (Redmi Note 13) doesn't allow me to change my password. It almost seems like I have to delete the account and add it again from scratch. Is it absolutely necessary or is there an alternative system?

Until yesterday, I had no issues accessing my Yahoo account. However, all of a sudden, the Yahoo login popup has started appearing.

After entering the password, I get the error: "Something went wrong. We could not sign you in. Try again from a different device."

I checked and tried following:

• The authentication method is set to OAuth2.
• Cookies are enabled in settings
• Tried Yahoo account password and app one time password
• Deleted account in Thunderbird and created from scratch. The same login popup appears but fails the same.
• Deleted all cookies from yahoo in the "Show cookies" dialog in the setting.

Any help is appreciated.

It's puzzling when you ask "Why does my Gmail automatically sign out?" after setting it up in Thunderbird, especially since desktop email clients usually maintain a continuous connection. The message "You have been signed out of this account. This may have happened automatically because another user signed in from the same browser" strongly suggests a conflict, but it's typically a browser-related error, not a direct Thunderbird logout.

The most likely culprit for Thunderbird losing access to your Gmail is an authentication issue. Modern Gmail access in Thunderbird relies on OAuth2, a secure protocol. If the OAuth2 token becomes invalid or expires, or if Thunderbird's internal web component (used for the OAuth2 login pop-up) has issues like cookies being disabled, it can repeatedly prompt you for login.

Less common, but possible, are: Google's security systems detecting unusual activity and temporarily blocking access, or, if you're not using OAuth2 and have 2-Step Verification enabled, an expired or revoked App Password. While less direct, a concurrent, conflicting sign-in in a web browser using the same Google account could also contribute to Google invalidating sessions.

To resolve this, ensure your Thunderbird Gmail account is configured to use OAuth2 for both incoming (IMAP) and outgoing (SMTP) server settings. Also, verify that Thunderbird is allowed to accept cookies under its Privacy & Security settings, as this is crucial for the OAuth2 process. Removing saved passwords for the Gmail account in Thunderbird and then restarting it can force a fresh OAuth2 re-authentication.

I installed Thunderbird and set up my Outlook account with no problem. However, every time I try to add my Gmail account I get an error message "Unable to log in at server. Probably wrong configuration, username, or password." This happens whether I try to set up the account using either Thunderbird's automatic configuration by doing a manual configuration. Can anyone help? I can log into Gmail on the web with this email address and password with no problem.

I accidentally told Firefox to autofill a password for a website. I have followed all methods I found on web & in Mozilla support without success., except I don't want to stop or delete ALL autofills. Firefox doesn't show this password as saved (even when I search for it by URL), and the "Saved Logins" section of "passwords & security" [in settings] NO longer exists. I do NOT want to delete all autofills. I also checked my settings for this website, and it is NOT causing the autofill. Please: How do I stop Firefox from autofilling of a password for a SINGLE website? Thank you!

While trying to retrieve new messages for one of my email accounts, I keep getting the message "Login to server xxx.xxx.xxx with username xxx@xxx.xxx failed."

I click the "Enter New Password" button and enter the same password that I use to successfully login to the account on a browser, and it STILL fails and keeps showing the same message box.

This started happening this morning. Have others reported this problem? What do I need to check to see if there is a problem in either Thunderbird or in my email account settings?

Thanks for your help!

Hi,

Firefox android provides no master password/primary password protection so passwords in the Firefox password manager are protected only by your lockscreen swipe(yeah, I thought the same thing you just thought).

I need full protection like on Desktop or I can't sync my passwords to Firefox. However, when temporarily enabling password sync on desktop, for example between two desktop devices it also temporarily enables it on android Firefox that you might have synced as well. The upshot of this for me is that I now have all my passwords on android without wanting them there for the above reasons.

So, how do I remove all passwords on my firefox android, without having to reinstall Firefox on the phone?

After an apparent system-wide aol failure, I can no longer log in to my Thunderbird account. When I open it, the message pops up: "Login to server imap.aol.com with username Leisterr8@verizon.net failed." And it asks for a new password. I looked up my saved passwords and tried to enter them. But that does not work. I don't see how to enter a new password. I am able to log in to my aol.com account with my password. But that does not seem to be the same as the password for the Thunderbird account.

Whenever I go onto a Microsoft website, I have a terrible (consistently mildly inconvenient) time signing in. For whatever reason, it always tries to sign in with my school account instead of my personal account, and I have to manually change to the account I actually want to use. I don't know why it keeps defaulting like this but it's very annoying, what can I do about it?

Hello,

I am requesting assistance with a persistent issue in Thunderbird involving a Google Workspace (Gmail) account for my domain, dantanas.com.

Incoming IMAP works correctly. However, outgoing SMTP authentication fails every time.

Symptoms

The Google OAuth login window never appears when Thunderbird attempts to authenticate SMTP.

Sending mail produces the error: “Unable to authenticate to Outgoing server (SMTP). Please check the password and verify the authentication method.”

IMAP works normally, but SMTP never prompts for OAuth authentication.

Thunderbird also does not allow me to have a Junk/Spam folder for this account — the option appears disabled or unavailable.

Current configuration Thunderbird is using

SMTP Server: smtp.gmail.com Port: 465 or 587 Security: SSL/TLS or STARTTLS Authentication: OAuth2 User: max@dantanas.com

IMAP Server: imap.gmail.com Port: 993 Security: SSL/TLS Authentication: OAuth2

What I have already done

Verified DNS MX and DKIM records on the domain (email receiving works).

Confirmed I can log in to the account in a browser with no issues.

Tried both port 465 and 587.

Removed and re-added SMTP servers in Thunderbird.

Forced Thunderbird to attempt OAuth2 authentication, but the OAuth window never appears.

Tested other clients, which authenticate correctly — suggesting the issue is specific to Thunderbird.

Expected behavior

Thunderbird should open a Google OAuth browser window to authenticate SMTP. This never occurs, which prevents SMTP from working entirely.

Request

Could you please advise:

Why Thunderbird does not open the Google OAuth authentication window for SMTP?

Whether there is a known issue affecting Google Workspace OAuth in Thunderbird?

How to reset or repair Thunderbird’s OAuth behavior?

Why Thunderbird does not allow the creation or use of a Junk/Spam folder for this account?

Any guidance would be appreciated. I’ve spent considerable time troubleshooting, and resolving the OAuth prompt issue is essential for SMTP functionality.

Thank you, Max Makowski max@dantanas.com

I enter the primary password for saved password when starting FF as prompted. It takes password fine and works just fine on sites just as designed and has worked for years. Lately last couple weeks since last update to 132.0.1 I notice a change. I didn't notice before this update. When starting Firefox it asks for primary password which is normal, I enter it and all is fine. I can go to sites and all works fine, passwords and user id are entered when prompted. However, later in the day when I go to a site wanting password, I get the prompt to enter primary password again. That never use to happen, once I entered the primary password, it didn't prompt again unless Firefox was restarted. Has anyone else seen this? Maybe it started and I just didn't notice some time ago. I know it wasn't that long ago the primary password prompt didn't have the little eye so you could see what you typed. I liked that, because FF for whatever reason wasn't always realizing I had the shift key pressed. Now with the eyeball I can see that it doesn't have what I typed, but that is not the problem I am asking about. Below is what Mozilla says about primary password:

Important: After you have defined and set your Primary Password, you will be prompted to enter it once for each Firefox session, when Firefox needs access to your stored passwords. This also applies if you want to add, remove or show a password.

Every time I try to access my email account I get a message that the "email account failed" and asks for my password (and sometimes new password). But when I enter the password I keep getting the same error message!