smtp2.isiline.it has no MX records.
Question and response
Question
dig smtp2.isiline.it. MX
Answer
The response has no answer records.
Authority
isiline.it. 600 SOA ns.isiline.it. postmaster.isiline.net. 2026022002 86400 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0