mx1.adequatesystems.com has no NS records.
NS records for this zone are defined at adequatesystems.com.
NS records for this zone are defined at adequatesystems.com.
Question and response
Question
dig mx1.adequatesystems.com. NS
Answer
The response has no answer records.
Authority
adequatesystems.com. 600 SOA ns2.adequatesystems.com. root.adequatesystems.com. 2019060601 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0