If you signed in to your account within the past 8 hours and didn't sign out at the end of your session, going to www.att.net will sign you in automatically. Note : If you checked the Keep me signed in for 2 weeks box, and you were automatically signed out before the 2 weeks ended, you can learn why and find answers on the Yahoo!
Take a trip into an upgraded, more organized inbox with Yahoo Mail. Login 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.
Yahoo has their own home/portal page and att has their own distinct home/portal page (start.att.net). Yahoo has their webmail you access from the yahoo home page and att has their own (although it is co-branded with both att and yahoo on the login page and the webmail again since yahoo is att's ESP).