Set the checkmark for Accept cookies from sites.Īfter you have gone through the OAuth process, if you prefer, you can again reject cookies, because receiving and sending mail will work with cookies rejected.In the Address of website input box, enter.Click the nearby Exceptions… button to open the Exceptions - Cookies dialog.Create an exception to accept cookies from Google:.If Accept cookies from sites is not checked, do one of the following and then go through the OAuth login process again: Look at the checkbox Accept cookies from sites.Do ≡ > Preferences > Privacy & Security > Web Content.How to avoid or correct an OAuth failure caused by rejected cookiesįirst, verify your general setting for cookies in Thunderbird: You need to accept cookies at least temporarily using one of the methods described below.

If you have rejected cookies in Thunderbird, the OAuth setup process will fail because some cookies must be accepted to store data between page updates. Ensure that Security Settings > Authentication method is set to OAuth2.Ĭookies and javascript must be enabled for the OAuth 2.0 setup process to work.Underneath your account entry, select the Server Settings subsection (if it is not visible, you may need to toggle the > button first).

Click on the OK button to confirm your SMTP Server settings.

In the SMTP Server dialog, ensure that Authentication method is set to OAuth2.

Click on the Edit SMTP Server… button on the right.

At the bottom of the settings pane, look for Outgoing Server (SMTP).

Ensure that your Thunderbird Gmail account is set to OAuth2 Outgoing Server (SMTP) You can also use the following steps on any newer version of Thunderbird to double-check that your authentication method is actually set to OAuth2. However, if you want to continue using an old version of Thunderbird below 91.8.0 at your own risk, you will have to change the authentication method to OAuth2 yourself. We recommend updating to the latest version of Thunderbird for the latest security fixes and many other bug fixes and improvements.

Gmail server settings for thunderbird