mx.appleconsultingmarin.com has no NS records.
NS records for this zone are defined at appleconsultingmarin.com.
NS records for this zone are defined at appleconsultingmarin.com.
Question and response
Question
dig mx.appleconsultingmarin.com. NS
Answer
The response has no answer records.
Authority
appleconsultingmarin.com. 3600 SOA dns.appleconsultingmarin.com. hostmaster.appleconsultingmarin.com. 1899792970 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0