postmaster.heysender.com.kinstavalidation.app has no A records.
Question and response
Question
dig postmaster.heysender.com.kinstavalidation.app. A
Answer
The response has no answer records.
Authority
kinstavalidation.app. 1800 SOA elliott.ns.cloudflare.com. dns.cloudflare.com. 2397519811 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0