All Products Community Forum

I changed my email password on the providers web site, my phone, tablet both asked for the new password but Thunderbird has not, why can I still send and receive email ?

And don't see a place to change the server password either, I thought it would just ask.

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 internet provider has required a new account password for my wife’s Thunderbird account. We have changed the account with the provider, but I cannot figure out how to change it in Thunderbird so she can logon and send email without having to re-enter the password each time. Several online searches have provided various “solutions” that lead to non-existent menu choices.

This shouldn’t be this hard! Is there a way to address this with a phone call to a knowledgeable real human being??

Using Thunderbird b150, but have tried -esr and regular TB. New install of Win11 26200.8037. Up to date Firefox. Have been trying for a week for Thunderbird to authenticate my Outlook account. Worked with Copilot. Finally found a TB setting, network.proxy.allow_hijacking_localhost, that was set to FALSE. Set it to TRUE and Outlook account authenticated. Able to finally send mail. This was last night. This morning: Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.office365.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. No changed to any programs. Have deleted Outlook saved password. Thunderbird NEVER offers to get password/authenticate. I am truly and sincerely frustrated.

If someone can help me, would sincerely appreciate.

I've been trying to get Thunderbird and the home manager of Nixos to work nicely together. This seems to have been the case judging by the vast amount of config options that are present in the tool.

However, it seems development slowed and I was wondering whether there's a workaround to some of the problems. More precisely, nixos only does static configs - so things you know at compile time. This works great for credentials you know a priori like plain passwords or probably also encrypted password but it starts to fail once tokens start getting involved like with oauth2 (any most likely also Kerberos).

Since home manager in nix does not know the the token, it can only populate the account half way. The rest is subsequently handled by Thunderbird itself, asking you to perform the OAuth flow.

Here are two distinct issues. 1. If I create the "wrong" account - plain password instead of oauth2 - and I update the account to oauth2. Even with a restart of the entire system, Thunderbird doesn't understand that it needs to perform the authentication flow again. Even if I delete any passwords Thunderbird has stored in it's password manager. 2. I have a bunch of email accounts, work, private, university. I would like to keep them separate [...]. However, suppose I have three mail boxes within my university domain and I added all of them in this incomplete fashion as I outlined (everything done except password / authentication), Thunderbird will perform the OAuth2 flow for the first mailbox but the it won't do it for the other two. I just get

The current operation on 'Inbox' did not succeed. The mail server for account ethz-main responded: Command Error. 12.

for the other two mail boxes.

I'm well aware that a big contributor to this issue is NixOS and Home Manager. And I'm in touch with these parties trying to find a solution. What I wanted to ask from the Thunderbird / Mozilla community:

Is there a way to reinitialize the OAuth2 flow or password prompts for any account from the UI or alternatively from the shell? Because deleting the credentials didn't start it (well at least in my case) and I would like to find an explicit way to tell Thunderbird "for account x, please ignore all authentication info you have, perform the auth flow again and then update the auth details with whatever response you got." I'd prefer to be able to things like this rather than deleting and adding the account again. Especially considering that across all Accounts I have about 30Gb of data needs to be fetched every time.

Thank you for your Response and Support

AS2k

Hi, help please I need to connect my mozilla account to antoher device and I tried everything to add it but it keeps asking for this WANTED verification code and I never get it, even if my mail is correct, I adeed the mozilla address mail. Of course there is no way to contact them as they rely on their community to do the work for them. I wanted to leave mozilla recently cause of the AI direction, and I see that the basic settings user's options don't even work correctly :*

thanks

My K-9 in Android suddenly stopped to work a couple of days ago. The server asks for autentification. I haven't changed anything. I've uninstalled and reistalled the app and restarted my phone a Samsung S22 ultra several times. The app is recognating some settings automatically but it doesn't accept my old password with 16 letters in a group of four with highfens in between. What shall I do, please? Something wrong with the server? The version of the app is 17.0 updated March 16th 2026.

I have installed Thunderbird on my Samsung phone and synced it with the desktop. All three of my gmail accounts came up okay, but when I go into them I do not get the inbox, only outbox. When I click on each account to try to sign in I get an error that says "OAuth 2.0 is currently not supported with the provider". How can I sign in to my gmail accounts on my phone in Thunderbird?1

I would like to sign in to my account, xxxxxxx@yahoo.com,but do not remember the password. _{email address username deleted}

Greetings, I'm some insight on having to constantly enter my password (ISP) to download email messages. Ever since I can remember when I started Thunderbird I would enter my ISP password for my accounts once and it would download the messages as long as Thunderbird was running. I think after a Thunderbird update, now every 10 minutes when Thunderbird checks for new email messages I'm prompted to enter my ISP password. I do not tell Thunderbird to remember my password and I'm not sure what has changed to cause this, any insight is appreciated!

how to change primary password manager to another 100% trusted password manager like proton pass, nord pass, bitwarden password manager etc.. in firefox.

In windows and android, if there is no feature means kindly add that features.

Cannot access Tbird on PC, but have done so using Outlook; and Tbird Outlook & Samsung mail on mobile. Gmail: some new messages and those quite old are accessible. See Screenshot. iinet: nothing accessible. See Screenshot. The password used to access on webmail works there but is not working in Tbird on thePC. Three technicians have attempted and myself have attempted to rectify. A primary password was used earlier, this has been unsuccessfully tried. It isn't required now. I fear this may be the problem but don't know how to rectify.

Today I have experienced a problem downloading new messages, bulk, trash or anything else in my mail server into thunderbird. it requires my primary password and then my regular password. I just set up my primary password so I understand why it is asking for that, but I don't understand why it is also asking for my regular password before I can get access to the mail server that I am using. the regular password was set up on 6/17/24 and until today it was working fine.

Buongiorno ho cambiato la password della mail certificata ma non riesco a modificarla anche sullo smartphone sul quale gestisco la posta tramite l'app tunderbird .come devoprocedere?

Attempting to set up a yahoo email in thunderbird 140.9.0esr(64-bit). The goal is to have this set up on multiple workstations, so I've made the adjustments recommended per this article: https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo#w_please-check-the-following-before-asking-for-support

So, the toggle for mailnews.oauth.usePrivateBrowser is set to true, site/third-party cookies are always allowed (no exceptions), and the authentication method is set to OAuth2. Using the recommended server settings for yahoo: imap.mail.yahoo.com : 993 smtp.mail.yahoo.com : 465

I am able to set up the initial OAuth. The window pops up, I log in using the account password then put in the texted code, then the window closes and I get an email confirming the login. Hitting done within Thunderbird after this has it check the password again, and it fails: "Unable to log in at server. Probably wrong configuration, username or password."

This is on a fresh Windows 11 install/fresh Thunderbird install.