ip-81.180.74.23.utm.md has no MX records.
Question and response
Question
dig ip-81.180.74.23.utm.md. MX
Answer
The response has no answer records.
Authority
utm.md. 1800 SOA poppy.ns.cloudflare.com. dns.cloudflare.com. 2397515032 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0