Don’t you know why you cannot access your SBCGlobal email account on Outlook? If np, then it is because you are using the wrong server settings. You can take a look at the settings given below and then update it accordingly on your system:
Email protocol: POP3
• Inbound server: inbound.att.net
• Inbound port: 995
• SSL: Yes
• Outbound server: outbound.att.net
• Outbound port: 465
Email protocol: IMAP
• Inbound server: imap.mail.att.net
• Inbound port: 993
• SSL: Yes
• Outbound server: smtp.mail.att.net
• Outbound port: 465 or 587
If the error persists even after entering the correct email settings, you can dial SBCGlobal customer serviceand ask for technical assistance from experts.