spf.abacus.ch has no CNAME records.
Question and response
Question
dig spf.abacus.ch. NS
Answer
The response has no answer records.
Authority
abacus.ch. 1362 SOA dns1-1.abainfra.net. hostmaster.abainfra.net. 2026020102 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0