The procedure is relatively simple and can be carried within a couple of minutes. Start by navigating to the AT&T email service on Yahoo using any Web browser. Next, click on the Check Mail link to be directed to the AT&T login page. Please note that ever since AT&T acquired BellSouth, the Bellsouth.net email login can only be done on AT&T's official page. Please enter your email address and password in their respective columns to login into your BellSouth account, and your login is complete.