Set up my phone through the yahoo servers for att.net email without issue.
My wife phone has the issue. I am using the Yahoo server for email for her att.net account, and I am entering her email and password correctly. She can RECEIVE email just fine. When she replies or sends it will not go through. It says the username or password for the mail account is incorrect.
I have read a lot online with this and have found no answers. Took the phone to Verizon this AM and spent the better part of 2.5 hours there. They tried every possible server configuration.
Never had issue with her email or mine on the iPad.
Thought I would come here for help. Any ideas?