mail11500.emails.midwayusa.com has no NS records.
NS records for this zone are defined at midwayusa.com.
NS records for this zone are defined at midwayusa.com.
Question and response
Question
dig mail11500.emails.midwayusa.com. NS
Answer
The response has no answer records.
Authority
midwayusa.com. 900 SOA ns-728.awsdns-27.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0