mx.sjusgi.com has no NS records.
NS records for this zone are defined at sjusgi.com.
NS records for this zone are defined at sjusgi.com.
Question and response
Question
dig mx.sjusgi.com. NS
Answer
The response has no answer records.
Authority
sjusgi.com. 3600 SOA dns.sjusgi.com. hostmaster.sjusgi.com. 1272520114 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0