mta02.communicatoremail.com has no NS records.
NS records for this zone are defined at communicatoremail.com.
NS records for this zone are defined at communicatoremail.com.
Question and response
Question
dig mta02.communicatoremail.com. NS
Answer
The response has no answer records.
Authority
communicatoremail.com. 600 SOA ns-415.awsdns-51.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0