Your SBCGlobal Email setting steps to process on iphone are very easy to process and understand. If due to certain technical issues, or lack of knowledge there you are not able to customize your mail, then you can take help from official help center, or get in touch with support staff via phone call. https://www.att-customerservice.com/blog/att-email-settings
Unlock your iPhone and go to the ‘Settings’ section.
Go to the ‘Mail’ section and click ‘Add Mail Accounts. ...
Provide your SBC Global email address and current password.
Select the email account type (either POP3 and IMAP)
Enter the incoming and outgoing mail server settings.