Thunderbird continues to lose my password for incoming and outgoing mail. Occasionally it works, but I keep getting messages that my password doesn't work / enter new password. When I go to passwords, it does not show the incoming or outgoing servers so I can make sure my password is there. I use Xfinity for my email. It was suggested earlier that it is an Xfinity problem. My Thunderbird email is essentially unuseable. I need it to work!