Take a trip into an upgraded, more organized inbox. Sign in and start exploring all the free, organizational tools for your email. Check out new themes, send GIFs, find every photo you’ve ever sent or received, and search your account faster than ever.
Go to att.net. Select Mail. Enter your email address and password. Select Sign In. To stay signed in, select Keep me signed in. Heads up: If you’re already signed in to att.net or AT&T Begin, select Home and then Mail.
My old homepage was "att.yahoo.com" (which was not the same as yahoo.com) I would login to that to fetch my att.net emails. When att started the homepage "start.att.net" I would do the same thing to fetch my emails. I never had a Yahoo account other than the one associated with the homepage and email and I NEVER had to login to a separate window.