whm02cpt.rackzar.net has no MX records.
Question and response
Question
dig whm02cpt.rackzar.net. MX
Answer
The response has no answer records.
Authority
rackzar.net. 1800 SOA adel.ns.cloudflare.com. dns.cloudflare.com. 2398430026 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0