ns2.edgedns.world has no MX records.
Question and response
Question
dig ns2.edgedns.world. MX
Answer
The response has no answer records.
Authority
edgedns.world. 300 SOA ns1.edgedns.world. support.edgecenter.world. 1684237808 5400 3600 1209600 300
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0