smtp.fibertelecom.com has no MX records.
Question and response
Question
dig smtp.fibertelecom.com. MX
Answer
The response has no answer records.
Authority
fibertelecom.com. 3600 SOA ns.fibertelecom.com. noc.fibertelecom.it. 2025122019 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0