mx.normhost.net has no NS records.
NS records for this zone are defined at normhost.net.
NS records for this zone are defined at normhost.net.
Question and response
Question
dig mx.normhost.net. NS
Answer
The response has no answer records.
Authority
normhost.net. 10800 SOA dns13.ovh.net. tech.ovh.net. 2025091501 86400 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0