dns33099.dizinc.com has no MX records.
Question and response
Question
dig dns33099.dizinc.com. MX
Answer
The response has no answer records.
Authority
dizinc.com. 14440 SOA ns1.dimenoc.com. network.dimenoc.com. 2019067883 300 300 2419200 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0