spf.versio.nl has no MX records.
Question and response
Question
dig spf.versio.nl. MX
Answer
The response has no answer records.
Authority
versio.nl. 3600 SOA ns3.cldin.eu. hostmaster.versio.nl. 1772222714 3600 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0