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unable to login to my thunderbird account

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Unable to log in to Thunderbird

Unable to log in to Thunderbird

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Thunderbird will not accept my log in credentials

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Please help me login to Thunderbird. My computer was updated and now it won't accept my credentials

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who is your mail provider?

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ATT/Yahoo mail provider.

Message: Sending of password for user alphamachine@sbcglobal.net did not succeed. Mail server inbound.att.net responded: [SYS/TEMP] Server error - Please try again later.

Saved password: AJKZrl8ERFUO4EprkK1UM3_a8rF_dZYVywXZFA0ALA57EIItZnmexr6Y Where did this password come from? Does not agree with password used in browser.

Can access email thru Yahoo via Firefox browser.

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