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To: Thunderbird Development & Support Team Subject: Gmail Account Wizard incorrectly configures SMTP, causing OAuth2 window completion failure

Dear Thunderbird Team,

I am writing to politely report a critical bug we recently identified during the automated account creation process for a Google Mail (Gmail) account. The bug prevents the Google OAuth2 authentication window from closing and ultimately halts the account setup process.

Environment Context Account Type: IMAP/SMTP (Gmail) Authentification: OAuth2 Description of the Issue When using the Thunderbird Account Setup Wizard to connect a new @gmail.com email address, the wizard automatically pulls configuration data for Google services. However, the configuration pulled for the outgoing server (SMTP) is consistently corrupted.

Specifically, the following variables are written to the prefs.js file:

IMAP Configuration: Generates correctly as imap.gmail.com with authMethod: 10 (OAuth2). SMTP Configuration: Incorrectly generates the hostname as literally ".gmail.com" (missing the "smtp" prefix) and assigns authMethod: 0 (None) instead of 10 (OAuth2). (e.g., user_pref("mail.smtpserver.smtpX.hostname", ".gmail.com");) Symptoms and Behavior OAuth2 Window Hang: Because the SMTP server address is malformed (.gmail.com) and cannot be resolved, when the user successfully authenticates in the Google OAuth2 pop-up and grants all permissions, Thunderbird attempts to finalize the setup against the non-existent SMTP gateway. This silent background failure results in the OAuth2 pop-up window spinning/hanging indefinitely with the message "Waiting for authorization". It never closes. UI Blank Dropdown Bug: If the user forces the wizard closed and attempts to view the new IMAP profile in Account Settings -> Server Settings, the "Authentication Method" dropdown is entirely blank (no text, no selectable options). This occurs because the crashing wizard also fails to inject user_pref("mail.server.serverX.is_gmail", true); into prefs.js. Without the is_gmail flag, the legacy UI is unable to map the internal authMethod: 10 integer to the "OAuth2" string in the dropdown menu. Working Solution / Workaround Used The issue is definitively tied to the automated wizard's database fetch/parsing mechanism. We were able to completely bypass this bug by closing Thunderbird and manually injecting the pristine configuration directly into the core prefs.js file:

Fixing the SMTP hostname to smtp.gmail.com. Setting mail.smtpserver.smtpX.authMethod to 10. Supplying user_pref("mail.server.serverX.is_gmail", true); to fix the UI rendering. Defining proper directory and directory-rel paths for the storeContractID. Upon restarting Thunderbird with the manual internal configuration applied, the OAuth2 pop-up window appeared on the first sync, processed the Google token instantly, and closed successfully without any hangs.

Conclusion Please investigate the ISP auto-configuration database logic that is currently generating .gmail.com as the SMTP hostname. This flaw breaks the entire OAuth2 token routing mechanism and creates a highly confusing infinite loop for everyday users trying to add their Google accounts.

Thank you for your hard work and for keeping Thunderbird an incredible email client!

Best regards.

How can I change an IMAP server on an existing T-bird account after T-bird deleted the saved password and IMAP server for that account? I tried to change the IMAP server address for an existing T-bird account, but T-bird and/or my ISP deleted the saved password and IMAP server entry for that account, so T-bird cannot get incoming E-mails. I would like to add an/the IMAP server back to the account without deleting the account, adding all of its settings again, and waiting 6 hours for T-bird to re-download all of the most recent 10,000 messages in the Inbox and all of the 15,000 messages in other folders again. The SMTP server and its saved password are still in the Saved Passwords table.

I am trying to add IdeasDale@zohomail.com to my Thunderbird email. It is set as Incoming – imap -- Port: - 993 Server: - imap.zoho.com Outgoing – smtp –- Port: - 465 Server: - smtp.zoho.com

I recently installed a new computer and can't create a pop3 account. Always gives me this error when i enter my correct password: Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]Minder tonenComponent returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI] imap account creation does work.

BUENOS DÍAS, INSTALE EL THUNDERBIRD EN MI LAPTOP, PERO POR ERROR COPIE UNA DIRECCION EQUIVOCADA,, AL INTENTAR ELIMNIARLA NO HE PODIDO POR NINGUN MEDIO, NO ME APARACE LA OPCION "Operaciones sobre la cuenta" SOLO ME SALE UNA VENTANA CON LA OPCION ESTABLECEER COMO PREDETERMINIDA Y ELMINAR PERO AL QUERER HACERLO NO SE ELIMINA.

HE ACUDIDO A NUMEROSOS VIDEOS PERO NINGUNO FUNCIONA, ME SALE UNA VENTANA EN LA PARTTE INFERIOR DERECHA QUE INDICA QUE MOZILLA NO PUEDO CONECTAR CON SERVIDOR.

HE IDO A CONFIGURACION DEL SERVIDOR, HE SEGUIDO TODOS LOS PASOS PERO NO PUEDO ELIMINAR, QUIZAS ESTE HACIENDO ALGO MAL.

YA EJECUTE COMO ADMINITRADOR, VERIFIQUE EL TEMA DE LOS CALENDARIOS Y NADA.

ESPERO QUE ALGUIEN ME PUEDA AYUDAR, QUEDO AGRADECIDO DE ANTEMANO.

I'm trying to remove a couple accounts that I no longer use in Thunderbird. A window keeps popping up asking for a password, but the mail service is no longer available. When I click on the red delete button for that account, nothing happens. I've deleted all the mail in one of them which I was able to do as I thought I might need to do that first, but I still can't delete it after that. The other one won't even let me delete the emails. How do I delete these so I stop getting asked to put in a password for accounts that are no longer valid and I don't want anymore?

My computer crashed and cannot recover anything from it. I cannot remember where my e-mail is. I remembered Yahoo and got my account back in that but cannot remember how to get back into my Thunderbird acccount. I remember my address but that isn't doing me any good without the actual e-mail account.

A hacker got into one of my accounts. All emails to all accounts do not get past the Yahoo and Google servers and I've only been able to restore service through principal account. How can I save my data and correct the compromised settings?

==

J

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Firefox Mobile 153, Android

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Built-in VPN is an innovative idea!

I use Firefox on my smart phones, tablets, and Linux laptops. Will I be able to use a single VPN account across all my devices?

Keep up the goid work! 👍🏿

After a keyboard accident I am left with this situation. Lin found the toggle problem with F8. Wxie suggested the password but the password is correct. Thanks to both of them. It seems the problem is the missing M in .com .It might be in the DNS but I don't seem to have anything to try except to try to recreate the account. If I try that I fear I will only exacerbate the situation. I have had this email for many years. This stared 08/08/2026 I have been searching daily for a solution. Like most things digital it is probably a simple fix if you know how. I don't.

I have created an account instance in account settings, and the "Test connection to server" says it is OK, but when I go to the mail tab the get messages button and New Message are grayed out an NO accounts are listed in the "folders" area. Not does it ever ask for my password to the SMTP server I have selected. I have an existing account with my own email service (Hover), and MUST connect to that. This is critical, as I need my e-mail to accomplish necessary activities.

I have installed Thunderbird for email but it was not what I thought it would be. I now want to cancel the account. However, the instructions are to Tools: Account Settings. 2. Select the account you want to remove on the left side. 3. Click the "Account Actions" button on the bottom left and choose, "Remove Account". Here is the problem. "Account Actions does not show"

I recently bought a new computer and I need to know how to register this computer to my Firefox account,. and also remove my old computer from my account and keeping the same account number.

Installed Thunderbird Setup 153.0.3 and npw when running t-bird get a prompt asking abut a 'thundermail" address. Please advise.. What is "thundermail" and why is it in my way? I am a regular donor to T-bird sent several, emails addressing the "thundermail" weirdness and thus far no reply. .

When selecting which email account to send FROM, the drop down shows a number of old email accounts. These accounts have been deleted. There are no details showing under the "account settings" or "Outgoing server." Which file stores the mail server information and where is it? I currently have around forty different email accounts across five mail servers.

Best regards