ns2.all4y.net has no MX records.
Question and response
Question
dig ns2.all4y.net. MX
Answer
The response has no answer records.
Authority
all4y.net. 3600 SOA all4y.net. root.all4y.net. 2025051901 43200 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0