I just upgrade my iMac to Monterey OS. I lost all my email information and folders and I'm trying to reestablish my Thunderbird email account. Thunderbird opens fine but when I try to receive or send emails it asks for a password. I've tried every password I can think of but none work. I didn't use to have to enter a password to get or send my email before I upgraded. How can I get my password or establish a new one? And how can I avoid having to enter a password? All my IP addresses are correct.