smtp-mdc.cgitrade360.com has no MX records.
Question and response
Question
dig smtp-mdc.cgitrade360.com. MX
Answer
The response has no answer records.
Authority
cgitrade360.com. 300 SOA ns.cgi.com. dnsops\.gto.cgi.com. 789869214 1200 180 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0