mx.simplyinseason.com has no NS records.
NS records for this zone are defined at simplyinseason.com.
NS records for this zone are defined at simplyinseason.com.
Question and response
Question
dig mx.simplyinseason.com. NS
Answer
The response has no answer records.
Authority
simplyinseason.com. 3600 SOA dns.simplyinseason.com. hostmaster.simplyinseason.com. 1390407535 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0