ns.edupage3.org has no MX records.
Question and response
Question
dig ns.edupage3.org. MX
Answer
The response has no answer records.
Authority
edupage3.org. 600 SOA ns75.domaincontrol.com. dns.jomax.net. 2025080601 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0