mx.onerestaurantplace.com has no CNAME records.
Question and response
Question
dig mx.onerestaurantplace.com. NS
Answer
The response has no answer records.
Authority
onerestaurantplace.com. 3235 SOA dns.onerestaurantplace.com. hostmaster.onerestaurantplace.com. 1806484251 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0