nameserver.ge.cnr.it has no MX records.
Question and response
Question
dig nameserver.ge.cnr.it. MX
Answer
The response has no answer records.
Authority
ge.cnr.it. 86400 SOA ns.ge.cnr.it. aiello.ge.cnr.it. 2025010601 86400 1800 2592000 172800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0