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(Login to server imap.videotron.ca with username (username....)failed) shows up continually and I don't know how to make it stop. It is stopping me from sending or opening emails. Can someone please give me a solution. I've just switched it to a new computer and I am getting the same messages on both computers. Thanks

I am trying to create my outlook.com account in Thunderbird. I see the Account Hub box, and have typed in my email address. But when I type in the password, I get an error message, "Authentication failed. Please check the username and password". It then says, "Exchange auth error". I have checked and double- and triple-checked the spelling in the email address and password, and signed in to my email via the Microsoft outlook.com page using the same email and password. I can sign in to my email using the latter method, but Thunderbird keeps giving me the same error message and won't create the account in Thunderbird. What am I doing wrong?