Emails have now become an essential part of everyday life. We couldn't live without it because all of our important messages are stored in our email account. If you get error 550 on the account screen, follow the steps in this post. When there is a problem with the recipient's address, the SBCGlobal Email Error Code 550 appears on the screen. You may be curious about the cause of this error code and how to resolve it on your own.