guides.heyloyalty.com.kinstavalidation.app has no MX records.
Question and response
Question
dig guides.heyloyalty.com.80ad5b49141b73d0.dcv.cloudflare.com. MX
Answer
The response has no answer records.
Authority
dcv.cloudflare.com. 1800 SOA graham.ns.cloudflare.com. dns.cloudflare.com. 2397924244 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0