mx.normhost.net has no CNAME records.
Question and response
Question
dig mx.normhost.net. NS
Answer
The response has no answer records.
Authority
normhost.net. 1447 SOA dns13.ovh.net. tech.ovh.net. 2025091501 86400 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0