ns2.fuseddns.com has no MX records.
Question and response
Question
dig ns2.fuseddns.com. MX
Answer
The response has no answer records.
Authority
fuseddns.com. 3600 SOA ns1.fuseddns.com. support.fused.wtf. 2020000006 172800 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0