mail.comdata.it has no CNAME records.
Question and response
Question
dig mail.comdata.it. NS
Answer
The response has no answer records.
Authority
comdata.it. 2495 SOA dns.itline.it. admin.dns.itline.it. 2025102201 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0