ns.kota.net has no MX records.
Question and response
Question
dig ns.kota.net. MX
Answer
The response has no answer records.
Authority
kota.net. 3600 SOA ns.kota.net. postmaster.kota.net. 2025052101 21600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0