smtp.eutelia.it has no CNAME records.
Question and response
Question
dig smtp.eutelia.it. NS
Answer
The response has no answer records.
Authority
eutelia.it. 10800 SOA ns1.eutelia.it. hostmaster.eutelia.it. 2014071141 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0