Using Mozilla Thunderbird with ATT E-mail
I have two different e-mail addresses running with a Thunderbird client. Both have worked fine for literally years. Both continued to work even after ATT updated to requiring OAuth compatibility. About eleven days ago one of the two addresses quit working and now only returns a failed connection "Sending password for user XXXXXX failed. Server responded error - please try again later. I have verified that the password is correct. Thunderbird has been OAuth compatible since version 28. I'm running version 78.7.1 which is the most recent version for my hardware/OS. Interestingly when I go into the server settings and set the authentication to OAuth2; I get a message that says the server does not support this authentication type and I need to adjust my server settings. So, what gives? Why does one e-mail work and the other doesn't? The settings are the same other than the name/pass info. What do I need to check to get this working correctly?