mx.plantsoftherocks.com has no NS records.
NS records for this zone are defined at plantsoftherocks.com.
NS records for this zone are defined at plantsoftherocks.com.
Question and response
Question
dig mx.plantsoftherocks.com. NS
Answer
The response has no answer records.
Authority
plantsoftherocks.com. 3600 SOA dns.plantsoftherocks.com. hostmaster.plantsoftherocks.com. 1583456356 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0