mx.thebrownbags.com has no NS records.
NS records for this zone are defined at thebrownbags.com.
NS records for this zone are defined at thebrownbags.com.
Question and response
Question
dig mx.thebrownbags.com. NS
Answer
The response has no answer records.
Authority
thebrownbags.com. 3600 SOA dns.thebrownbags.com. hostmaster.thebrownbags.com. 1422971264 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0