mx.gcmta.id has no NS records.
NS records for this zone are defined at gcmta.id.
NS records for this zone are defined at gcmta.id.
Question and response
Question
dig mx.gcmta.id. NS
Answer
The response has no answer records.
Authority
gcmta.id. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1771507487 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0