spf.mcb.dk has no MX records.
Question and response
Question
dig spf.mcb.dk. MX
Answer
The response has no answer records.
Authority
mcb.dk. 300 SOA ns.mcb.dk. hostmaster.mcb.dk. 2026030101 10800 3600 2592000 38400
Additional
ns.mcb.dk. 300 A 178.23.177.69
ns.mcb.dk. 300 AAAA 2a00:1cf0:0:9:0:0:0:69
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0