ns.edupage4.org has no MX records.
Question and response
Question
dig ns.edupage4.org. MX
Answer
The response has no answer records.
Authority
edupage4.org. 3600 SOA ns69.domaincontrol.com. dns.jomax.net. 2023061901 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0