mail.alma.it has no CNAME records.
Question and response
Question
dig mail.alma.it. NS
Answer
The response has no answer records.
Authority
alma.it. 7200 SOA dns.alma.it. hostmaster.alma.it. 2026022800 7200 3600 2592000 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0