As a user of AT&T email account, you can see your inbox for old or new emails and send or receive email to your account. You can also send email messages and save draft or forward emails etc. If you need to access your AT&T email account, so you have to login your AT&T net account using your email address or password. Follow the login process here:
1. Open your web browser and go to official website AT&T (https://more.att.com/email/)
2. Then hit the sign in button that page redirects to Yahoo mail.
3. Now, you have to enter your email id or password and click on the next button.
For more info - https://getassist.net/att-net-email-login/