Starting yesterday, what appears to be a bogus Yahoo website keeps opening up on my screen. Now I discover that when I select "Get Messages" on my Tbird this website opens and when I tried to sign into it, it said I should change my password by calling an 800 number, so I did not. I am suspicious. My email account is with Frontier.com (Yahoo portal) and when I logged into the Yahoo through frontier, I was able to access my emails. But I am not able to get my emails through Thunderbird. Why is this happening all of a sudden? Thank you.