Question and response
Question
dig smtp2.nikhef.infracom.nl. NS
Answer
smtp2.nikhef.infracom.nl. 5 CNAME smtps.infracom.nl.
Authority
infracom.nl. 1950 SOA ns3.infracom.nl. dom-reg.infracom.nl. 2026031100 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0