We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Authentication failure ALWAYS when everything is set right

  • 1 reply
  • 1 has this problem
  • 9 views
  • Last reply by Stans

mellorrw1
mellorrw1
more options

Hello. Using Thunderbird 91.10.0 (64-bit) MS Windows 7 64-bit SP1 (professional). Everything is set for oauth2 etc. Thunderbird connects to gmail. The password is correct. Cookies are set. When granting Thunderbird access to my emails, Authentication Failure. I have no tricks up my sleeve at this stage. It ought to work. Please advise a solution. (Gmail did not get back to me.) Regards

Hello. Using Thunderbird 91.10.0 (64-bit) MS Windows 7 64-bit SP1 (professional). Everything is set for oauth2 etc. Thunderbird connects to gmail. The password is correct. Cookies are set. When granting Thunderbird access to my emails, Authentication Failure. I have no tricks up my sleeve at this stage. It ought to work. Please advise a solution. (Gmail did not get back to me.) Regards

All Replies (1)

Stans
Stans
more options

There has been at least one other user with the same problem, Windows 7 being the culprit. I suggest you revert back to Normal Password authentication and use an app-specific password instead.