ns1.openprovider.nl has no MX records.
Question and response
Question
dig ns1.openprovider.nl. MX
Answer
The response has no answer records.
Authority
openprovider.nl. 3600 SOA ns-2004.awsdns-58.co.uk. dns.openprovider.eu. 2026020602 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0