mx.gamepool.pro has no NS records.
NS records for this zone are defined at gamepool.pro.
NS records for this zone are defined at gamepool.pro.
Question and response
Question
dig mx.gamepool.pro. NS
Answer
The response has no answer records.
Authority
gamepool.pro. 3600 SOA dns.gamepool.pro. hostmaster.gamepool.pro. 1450141260 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0