I use Thunderbird for two email addresses. Suddenly, in the inbox of one of the email addresses, the red flame appeared next to the date of ALL messages. When I click on an individual message, the yellow line appears with the warning "Thunderbird thinks this message is Junk mail". When I click on "Not junk" the yellow line and warning disappear for a second, then reappear. Thunderbird will not let me tell it that the message is not junk. I turned off junk filtering in settings, but the problem persists. How can I clear the red flame next to all the messages and tell Thunderbird the messages are legitimate? The messages in the inbox of the other email address are not marked as junk by Thunderbird.