ns4.bzctoons.net has no MX records.
Question and response
Question
dig ns4.bzctoons.net. MX
Answer
The response has no answer records.
Authority
bzctoons.net. 600 SOA ns1.bzctoons.net. bzctoons.gmail.com. 2026020100 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0