mx.dukabayreef.com has no NS records.
NS records for this zone are defined at dukabayreef.com.
NS records for this zone are defined at dukabayreef.com.
Question and response
Question
dig mx.dukabayreef.com. NS
Answer
The response has no answer records.
Authority
dukabayreef.com. 3600 SOA dns.dukabayreef.com. hostmaster.dukabayreef.com. 1621940668 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0