_spf.kurios.at has no MX records.
Question and response
Question
dig _spf.kurios.at. MX
Answer
The response has no answer records.
Authority
kurios.at. 3600 SOA zimmer73.nervenklinik.at. nico.kurios.at. 2026010601 3600 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0