It sounds problematic when the user is trying to send a separate email to a specific email id, and the person cannot receive the same. No doubt. This problem is caused by error code 550. Still, and user likely encounters sbcglobal error code 550 you need not worry. Some facile tricks can help to solve this error in fractions of seconds.
· Altering SMTP Server setting according to the requirement
· Entering the correct email address in the senders and recipient field.
Suppose you will need to more advanced solution to troubleshoot the problem. You can call the SBCGlobal Email customer service number and speak to an experienced email technician to learn how you can check the mail server settings for your email account.