a37.oktey.com has no MX records.
Question and response
Question
dig a37.oktey.com. MX
Answer
The response has no answer records.
Authority
oktey.com. 1800 SOA josh.ns.cloudflare.com. dns.cloudflare.com. 2396972625 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0