shop has no MX records.
Question and response
Question
dig shop. MX
Answer
The response has no answer records.
Authority
shop. 3600 SOA a.gmoregistry.net. noc.gmoregistry.net. 1771762287 1800 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0