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Yahoo mail has error at server login

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I've imported my settings from K-9 Mail and I tried to log in my accounts. GMail worked flawlessly, but Yahoo mentions that something went wrong and that: Developers: Please specify a valid request and submit again

I've imported my settings from K-9 Mail and I tried to log in my accounts. GMail worked flawlessly, but Yahoo mentions that something went wrong and that: ''Developers: Please specify a valid request and submit again''
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