smx02.yourdomainprovider.net has no NS records.
NS records for this zone are defined at yourdomainprovider.net.
NS records for this zone are defined at yourdomainprovider.net.
Question and response
Question
dig smx02.yourdomainprovider.net. NS
Answer
The response has no answer records.
Authority
yourdomainprovider.net. 3600 SOA ns1.yourdomainprovider.net. hostmaster.yourdomainprovider.net. 2026032001 3600 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0