Do you know? Some reasons are occurring issue with Sbcglobal email on iPhone. You know that what's the reason behind this issue. So here is list of causes comes Sbcglobal.net email not working in outlook problem: -
Poor internet connection
Incorrect username and password
Sbcglobal server is down
Wrong Sbcglobal email settings
Too much add-ons on your browser.
If you have not getting solutions, check this info - https://emailscrunch.com/sbcglobal-email-not-working-with-outlook/