mx.name-services.com.cust.a.hostedemail.com has no NS records.
NS records for this zone are defined at cust.a.hostedemail.com.
NS records for this zone are defined at cust.a.hostedemail.com.
Question and response
Question
dig mx.name-services.com.cust.a.hostedemail.com. NS
Answer
The response has no answer records.
Authority
cust.a.hostedemail.com. 300 SOA ns1.mdnsservice.com. hostmaster.mdnsservice.com. 2008042500 7200 7200 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0