Article doesn't make it clear, but I <i>assume</i> that SMTP 550-5.7.1 was an extant error code and the VA redistricting was simply the message body that the server returned alongside the error code? Otherwise the article might lead one to believe that error 550-5.7.1 was explicitly created for the purpose of VA redistricting (a la HTTP status code 418: "I'm a teapot").