ra.seeweb.it has no MX records.
Question and response
Question
dig ra.seeweb.it. MX
Answer
The response has no answer records.
Authority
seeweb.it. 21600 SOA dns.seeweb.it. hostmaster.seeweb.it. 2026022000 86400 7200 2592000 21600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0