mail240.msnd135.inmoo.net has no NS records.
NS records for this zone are defined at inmoo.net.
NS records for this zone are defined at inmoo.net.
Question and response
Question
dig mail240.msnd135.inmoo.net. NS
Answer
The response has no answer records.
Authority
inmoo.net. 900 SOA ns-215.awsdns-26.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0