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How did TB Password magically change to a "secure mail key" for AT&T Yahoo mail account?

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Snowmantv
Snowmantv
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I have always used the password from my AT&T Yahoo account in Thunderbird ( the same one I use to sign on to web based mail). I recently found that my TB password has changed to a 16 character "secure mail key". I didn't change it. How did it happen ?

I have always used the password from my AT&T Yahoo account in Thunderbird ( the same one I use to sign on to web based mail). I recently found that my TB password has changed to a 16 character "secure mail key". I didn't change it. How did it happen ?

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Matt
Matt
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Duplicate of https://support.mozilla.org/en-US/questions/1251253