dmarclf.com has no MX records.
Question and response
Question
dig dmarclf.com. MX
Answer
The response has no answer records.
Authority
dmarclf.com. 1800 SOA dean.ns.cloudflare.com. dns.cloudflare.com. 2397702291 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0