Question and response
Question
dig esp.smtp.dk. NS
Answer
esp.smtp.dk. 5 CNAME clients.mysmtp.com.
Authority
mysmtp.com. 3226 SOA pdns01.domaincontrol.com. dns.jomax.net. 2026011907 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0