sp0057.mtaspb.email has no NS records.
NS records for this zone are defined at mtaspb.email.
NS records for this zone are defined at mtaspb.email.
Question and response
Question
dig sp0057.mtaspb.email. NS
Answer
The response has no answer records.
Authority
mtaspb.email. 900 SOA ns-2033.awsdns-62.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0