mx.pooleswatercooler.com has no NS records.
NS records for this zone are defined at pooleswatercooler.com.
NS records for this zone are defined at pooleswatercooler.com.
Question and response
Question
dig mx.pooleswatercooler.com. NS
Answer
The response has no answer records.
Authority
pooleswatercooler.com. 3600 SOA dns.pooleswatercooler.com. hostmaster.pooleswatercooler.com. 1678617581 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0