mx.hairinninc.com has no CNAME records.
Question and response
Question
dig mx.hairinninc.com. NS
Answer
The response has no answer records.
Authority
hairinninc.com. 1100 SOA dns.hairinninc.com. hostmaster.hairinninc.com. 1629249565 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0