mx.galerep.com has no NS records.
NS records for this zone are defined at galerep.com.
NS records for this zone are defined at galerep.com.
Question and response
Question
dig mx.galerep.com. NS
Answer
The response has no answer records.
Authority
galerep.com. 3600 SOA dns.galerep.com. hostmaster.galerep.com. 1313241768 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0