Issues are with AT&T. I keep getting an error message asking me for my user name and password. This occurs every few minutes. Called AT&T support and they told me they have received numerous calls about this. They are trying to fix but this has been going on for weeks. Very frustrating.

I escalated the problem through social media to AT&T Advanced Customer Service and they are "adamant" the problem is with Yahoo. Said I should contact Yahoo directly; tried that - calls are just routed back to AT&T. This is the customer caught between these giants having "a failure to communicate." to quote Strother Martin.