Question and response
Question
dig www.xp-mailing.com. NS
Answer
www.xp-mailing.com. 5 CNAME mx.xp-mailing.com.
Authority
xp-mailing.com. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2026030802 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0