mx.myhrbalife.com has no NS records.
NS records for this zone are defined at myhrbalife.com.
NS records for this zone are defined at myhrbalife.com.
Question and response
Question
dig mx.myhrbalife.com. NS
Answer
The response has no answer records.
Authority
myhrbalife.com. 3600 SOA dns.myhrbalife.com. hostmaster.myhrbalife.com. 1974774813 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0