mx.threefirestourism.com has no NS records.
NS records for this zone are defined at threefirestourism.com.
NS records for this zone are defined at threefirestourism.com.
Question and response
Question
dig mx.threefirestourism.com. NS
Answer
The response has no answer records.
Authority
threefirestourism.com. 3600 SOA dns.threefirestourism.com. hostmaster.threefirestourism.com. 1310038643 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0