ns1.gmoregistry.net has no MX records.
Question and response
Question
dig ns1.gmoregistry.net. MX
Answer
The response has no answer records.
Authority
gmoregistry.net. 3600 SOA ns1.gmoregistry.net. noc.gmoregistry.net. 80316 3600 900 604800 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0