spf.sps-ocs.de has no MX records.
Question and response
Question
dig spf.sps-ocs.de. MX
Answer
The response has no answer records.
Authority
sps-ocs.de. 3600 SOA ns41.infomaniak.com. hostmaster.infomaniak.ch. 2026030201 10800 3600 605800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0