mx.piliflex.com has no NS records.
NS records for this zone are defined at piliflex.com.
NS records for this zone are defined at piliflex.com.
Question and response
Question
dig mx.piliflex.com. NS
Answer
The response has no answer records.
Authority
piliflex.com. 3600 SOA dns.piliflex.com. hostmaster.piliflex.com. 1442532015 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0