Question and response
Question
dig _dmarc.ivcert.net. NS
Answer
_dmarc.ivcert.net. 5 CNAME ivcert.net.hosted.dmarc-report.com.
Authority
dmarc-report.com. 900 SOA ns-618.awsdns-13.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0