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Thunderbird email login issue

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ever since your last software upgrade, my Thunderbird acct has not allowed me to login. I keep getting message " Sending username did not succeed mail server mail.twc.com responded invalid username or password" for ‘Thunderbird’ I do not know how to reset my account. I have over 150 addresses I can't retrieve. I know there is no one to speak with, but I have no idea how to proceed. I have looked at "saved passwords" and there aren't any on the list. Thank you, Dale

ever since your last software upgrade, my Thunderbird acct has not allowed me to login. I keep getting message " Sending username did not succeed mail server mail.twc.com responded invalid username or password" for ‘Thunderbird’ I do not know how to reset my account. I have over 150 addresses I can't retrieve. I know there is no one to speak with, but I have no idea how to proceed. I have looked at "saved passwords" and there aren't any on the list. Thank you, Dale

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