mx-vh.clara.net has no CNAME records.
Question and response
Question
dig mx-vh.clara.net. NS
Answer
The response has no answer records.
Authority
clara.net. 9517 SOA ns0.clara.net. hostmaster.clara.net. 2020031603 7200 3600 1209600 18000
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0