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How can I stop the password error messages? I can get and send mail

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I just changed my ISP. Thunderbird can both receive and send mail, but I keep on getting a password failure error message

I just changed my ISP. Thunderbird can both receive and send mail, but I keep on getting a password failure error message

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Please post this in the Thunderbird as this is in the Firefox area

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I keep on getting a password failure error message

Password failure error for what?

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Moderator moved this thread to Thunderbird support.