mx.ogjcareerfair.com has no CNAME records.
Question and response
Question
dig mx.ogjcareerfair.com. NS
Answer
The response has no answer records.
Authority
ogjcareerfair.com. 3320 SOA dns.ogjcareerfair.com. hostmaster.ogjcareerfair.com. 1562076289 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0