kumomta.odobit.com has no MX records.
Question and response
Question
dig kumomta.odobit.com. MX
Answer
The response has no answer records.
Authority
odobit.com. 1800 SOA aron.ns.cloudflare.com. dns.cloudflare.com. 2397119521 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0