To Set up Att.Net Email Account Outlook, firstly, open Microsoft Outlook on your device and click File. Then, go to Info or Account Settings and open the Email option. Next, click on the New button and then on the Next. Select Internet Email, then select Next. Complete your User Information, Server Information, and the Logon Information. After this, select More Settings. Complete Outgoing Server info and Advanced info. Select OK and then Next. Lastly, select Finish.