If you have an AT&T account, you can access your sub account email by logging in to your account and clicking on the “My Account” link at the top of the page. From there, you can click on the “Account Settings” link to get more information about your sub account. If you don’t have an AT&T account, or if your account is inactive, you can still access your sub account email by clicking on the “My Account” link at the top of the page and then clicking on “Settings.” From there, you can click on “Account Settings” to get more information about your sub account.