Question and response
Question
dig mx.pemsv27.net. NS
Answer
mx.pemsv27.net. 5 CNAME pemmx02.perfit-mail.net.
Authority
perfit-mail.net. 574 SOA ns-2042.awsdns-63.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0