mx.adlibhosting.com has no CNAME records.
Question and response
Question
dig mx.adlibhosting.com. NS
Answer
The response has no answer records.
Authority
adlibhosting.com. 257 SOA ns1-09.azure-dns.com. hostmaster.adlibsoft.com. 2018021736 900 600 86400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0