spf.senselan.ch has no CNAME records.
Question and response
Question
dig spf.senselan.ch. NS
Answer
The response has no answer records.
Authority
senselan.ch. 1800 SOA ns1.senselan.ch. noc.senselan.ch. 1772719285 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0