Can send but cannot receive emails
I have an old ATT email account that I've been trying to use. It looks like I can send emails through this email account but it cannot recieve emails. When I try to send something to this ATT email, it doesn't go through and this error appears: 550 5.2.1 <[email scrubbed]>... blank mailhost - invalid address, relay=[22.214.171.124]. I've attached a photo of the error.