Thunderbird decided not to download my mail anymore from mail.yahoo.com. Some messages were sent to advising that I need to delete and reinstall my account to update the new settings from yahoo. I deleted the account and tried to re-establish it. After working through the wizard and verified server settings, I get to the last page that checks login credentials. The credentials are correct - so very correct as I have verified them numerous times, including logging in successfully and separately from two different browsers. However, the verification page returns with the error, "Unable to log in at server. Probably wrong configuration, username, or password." Also, when clicking "Done", Thunderbird redirects to https://s.yimg.com/rq/darla/4-7-1/html/r-csc.html. This link drops in my user name, whereby I click "Next", which then tells me I have to allow cookies. i set my browser to Wide Open and restarted, yet nothing seems to work. At this point it appears I've lost all my saved emails, and I can't log in. Please help! Thank you, Michael