mx.hardflics.com has no NS records.
NS records for this zone are defined at hardflics.com.
NS records for this zone are defined at hardflics.com.
Question and response
Question
dig mx.hardflics.com. NS
Answer
The response has no answer records.
Authority
hardflics.com. 3600 SOA dns.hardflics.com. hostmaster.hardflics.com. 1458091927 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0