mx.purelinorise.com has no NS records.
NS records for this zone are defined at purelinorise.com.
NS records for this zone are defined at purelinorise.com.
Question and response
Question
dig mx.purelinorise.com. NS
Answer
The response has no answer records.
Authority
purelinorise.com. 3600 SOA dns.purelinorise.com. hostmaster.purelinorise.com. 1611053370 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0