Are you witnessing the Sbcglobal email error code 550 in your SBCGlobal account? If yes, then this error is related to the email address of the recipient and can occur because of the many reasons, and some of them are:
• The email authentication has been blocked.
• If the user is sending emails from an incorrect email address
• This code occurs even when then you are trying to send the email to an incorrect email address.
Once you are aware of the reason why this error code occurs, then you can resolve the issue on your own. Moreover, you contact experts by calling SBCGlobal Customer Service Number to seek their assistance as this number stays available at all hours in a day.

Also Read: how to fix sbcglobal sending and receiving email issues