Have configured Thunderbird server settings with the OAuth2 authentication. However, still unable to receive or send emails. Error message: "smtp.fontier.server does not recognize authentication method; change authentication method in settings." I believe I have made the suggested changes, but Thunderbird email still not working. I would like to visit via phone with a Thunderbird rep as the Support page has not given me any solutions. Please let me know if I can call and visit. Emailing me won't work.

Thanks, bzuehlsdorf