spf.staff.aruba.it has no MX records.
Question and response
Question
dig spf.staff.aruba.it. MX
Answer
The response has no answer records.
Authority
staff.aruba.it. 300 SOA arudns1.aruba.it. hostmaster.technorail.com. 2026022601 86400 7200 345600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0