spf.tribecrm.nl has no MX records.
Question and response
Question
dig spf.tribecrm.nl. MX
Answer
The response has no answer records.
Authority
tribecrm.nl. 600 SOA ns3.divinet.nl. edwin\.Somhorst.perfectview.nl. 2026012675 1200 900 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0