mxems.midasit.com has no NS records.
NS records for this zone are defined at midasit.com.
NS records for this zone are defined at midasit.com.
Question and response
Question
dig mxems.midasit.com. NS
Answer
The response has no answer records.
Authority
midasit.com. 900 SOA ns-16.awsdns-02.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0