Question and response
Question
dig tracking.heysender.com. NS
Answer
tracking.heysender.com. 5 CNAME gasmtp001-ams-lw.ubivox.net.
Authority
ubivox.net. 402 SOA pns31.cloudns.net. hostmaster.ubivox.com. 365 14400 7200 2419200 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0