Yesterday Thunderbird started failing to connect to my smtp server. It does connect to the pop3 server and get emails. I turned on smtp logging in Thunderbird and only see a message stating it is attempting to connect to smtp server. No error messages. No changes were made to Thunderbird.
I assume either NIS or Windows is blocking access. I checked the settings for Program Control and Thunderbird is listed. Only thing I remember is Windows Update installing something a couple of days ago when I shut down. Does anyone have any ideas on what to look for?
BTW, I attempted to turn off scanning of outgoing messages in NIS but still got the same result. Also, disconnected router from ISP and reconnected.
Leroy