_spf.tuve.fi has no CNAME records.
Question and response
Question
dig _spf.tuve.fi. NS
Answer
The response has no answer records.
Authority
tuve.fi. 1800 SOA pubdns1.etuve.fi. verkonhallintapalvelut.tuve.fi. 2025111114 10800 1800 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0