spf.nedlook.nl has no MX records.
Question and response
Question
dig spf.nedlook.nl. MX
Answer
The response has no answer records.
Authority
nedlook.nl. 300 SOA ns3.esmero.nl. support.esmero.nl. 2023121501 10800 1800 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0