Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Revision Information
  • Revision id: 240757
  • Created:
  • Creator: Wayne Mery
  • Comment: I've made further edits on the initial draft, but there are a couple more things to be done
  • Reviewed: No
  • Ready for localization: No
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Revision Content

Thunderbird 91.8.0, released 5th April 2022, converts Gmail accounts to oAuth2.0 to help users comply with Google's requirement of oAuth2.0 for Gmail logins.

Thunderbird changing the method of authentication to oAuth2.0 will cause problems if you have cookies disabled in Thunderbird, because cookies must be enabled for oAuth2.0 authentication flow to work properly. Without cookies to store data between page updates, the authentication flow cannot successfully complete the web pages served by Google.

To avoid or correct the problem, ensure that Accept cookies from sites is enabled at ≡ > Preferences > type cookies into the search field. (You can disable cookies after the oauth process is completed both for receiving and sending mail.)