mx.netfusionhub.store has no CNAME records.
Question and response
Question
dig mx.netfusionhub.store. NS
Answer
The response has no answer records.
Authority
netfusionhub.store. 3600 SOA dns.netfusionhub.store. hostmaster.netfusionhub.store. 1565124969 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0