I know other ATT email users that are using IOS devices and have not been effected. And I believe it is because they didn’t change their passwords and are working without any problems, as long as they don’t change their ATT email/Account passwords. And yes they are on the newest flavor of IOS.
I think it has something to do with the
https://currently.att.yahoo.com/ changes.
I Wish APPLE would add ATT as a Choice in their Mail APP, and if necessary add the other top Internet Providers (To show no biases) and make it very easy for us non technical customers to add their email accounts easily.
To me the APPLE IOS Mail APP is a neutral choice for using as a email APP.
They are NOT trying to sell or advertise anything in the APP, that I can remember.
They have a record and reputation of Super Tight Security. So that is why I wish they would stay neutral and make it show that they are neutral by fixing the Mail add account feature to Show ATT as a Choice, and Yahoo as it’s own Choice, and all the others too, Please?