Unable to log onto Comcast's Newsgroup

I have the correct user name and password, because I can check my email, but for some reason whenever I try to log onto it I get an authorization error.

I followed the directions as followed on the comcast website, and have tried to use different clients.

Any help at all would be great.

EDIT: I just found out that the email address I have been trying to use, is not my primary email. Unfortunately I don't remember what it is, is there anyway to find out what it is?

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