mx1.harsh.monkeybrains.net has no CNAME records.
Question and response
Question
dig mx1.harsh.monkeybrains.net. NS
Answer
The response has no answer records.
Authority
monkeybrains.net. 1261 SOA ns2.monkeybrains.NET. support.monkeybrains.NET. 2026012902 7200 1200 1209600 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0