mx2.michigandigital.com has no CNAME records.
Question and response
Question
dig mx2.michigandigital.com. NS
Answer
The response has no answer records.
Authority
michigandigital.com. 1800 SOA monika.ns.cloudflare.com. dns.cloudflare.com. 2397891653 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0