If you are log into your Yahoo email account and you send emails to another person, make sure your Incoming setting is correct, if the setting is not correct, then you can't send or receive an email on your yahoo account. To set your yahoo incoming setting, so you can read this guide, in this guide we are providing the way to set the proper server settings of yahoo, you can follow all the steps, and then you can set your yahoo mail incoming server setting.

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