mx.oriental18.com has no NS records.
NS records for this zone are defined at oriental18.com.
NS records for this zone are defined at oriental18.com.
Question and response
Question
dig mx.oriental18.com. NS
Answer
The response has no answer records.
Authority
oriental18.com. 3600 SOA dns.oriental18.com. hostmaster.oriental18.com. 1355556157 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0