mx.shoppinginrotterdam.com has no NS records.
NS records for this zone are defined at shoppinginrotterdam.com.
NS records for this zone are defined at shoppinginrotterdam.com.
Question and response
Question
dig mx.shoppinginrotterdam.com. NS
Answer
The response has no answer records.
Authority
shoppinginrotterdam.com. 3600 SOA dns.shoppinginrotterdam.com. hostmaster.shoppinginrotterdam.com. 1790460021 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0