sn2.clouditalia.com has no MX records.
Question and response
Question
dig sn2.clouditalia.com. MX
Answer
The response has no answer records.
Authority
sn2.clouditalia.com. 86400 SOA mnt1.eutelia.it. hostmaster.eutelia.it. 2015021204 86400 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0