mx-3.nederhost.nl has no CNAME records.
Question and response
Question
dig mx-3.nederhost.nl. NS
Answer
The response has no answer records.
Authority
nederhost.nl. 60 SOA ns1.nederhost.nl. hostmaster.nederhost.nl. 2026022305 86400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0