dns.comss.one has no MX records.
Question and response
Question
dig dns.comss.one. MX
Answer
The response has no answer records.
Authority
comss.one. 1800 SOA liv.ns.cloudflare.com. dns.cloudflare.com. 2397131724 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0