You probably need to change your yahoo email password using either the web browser on your phone or better still on your computer (easier to navigate yahoo on computer) Once you have reset your password, you will need to go back into your settings menu on the iPhone and change your password in the phone settings in order to access your email again.
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You probably need to change your yahoo email password using either the web browser on your phone or better still on your computer (easier to navigate yahoo on computer) Once you have reset your password, you will need to go back into your settings menu on the iPhone and change your password in the phone settings in order to access your email again.