mx.ssbizmailtest2net.com has no NS records.
NS records for this zone are defined at ssbizmailtest2net.com.
NS records for this zone are defined at ssbizmailtest2net.com.
Question and response
Question
dig mx.ssbizmailtest2net.com. NS
Answer
The response has no answer records.
Authority
ssbizmailtest2net.com. 3600 SOA dns.ssbizmailtest2net.com. hostmaster.ssbizmailtest2net.com. 1272654660 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0