mx.mijnspamfilter.nl has no NS records.
NS records for this zone are defined at mijnspamfilter.nl.
NS records for this zone are defined at mijnspamfilter.nl.
Question and response
Question
dig mx.mijnspamfilter.nl. NS
Answer
The response has no answer records.
Authority
mijnspamfilter.nl. 300 SOA ns1.mijndnsserver.nl. hostmaster.mijnspamfilter.nl. 2026022503 28800 7200 2419200 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0