_spf.internal.nextpertise.nl has no MX records.
Question and response
Question
dig _spf.internal.nextpertise.nl. MX
Answer
The response has no answer records.
Authority
nextpertise.nl. 3600 SOA ns1.dnszones.eu. hostmaster.dnszones.eu. 2026022602 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0