_spf.vianova.it has no CNAME records.
Question and response
Question
dig _spf.vianova.it. NS
Answer
The response has no answer records.
Authority
vianova.it. 6114 SOA dns.welcomeitalia.it. welcomeadmin.welcomeitalia.it. 2026030501 86400 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0