Here, you are expected to investigate your device directly to pick the Mail tab and a short time later select Email. Essentially, it needs to Reset My Att Net Email. Once, you select the Email tab then you need to see the way to will email account settings. Starting there, you have to pick your AT&T mail account. https://www.yahoocustomer-service.com/blog/how-do-i-reset-my-att-net-email