mailrelay01-pub.mx.pitdc1.expedient.net has no NS records.
NS records for this zone are defined at pitdc1.expedient.net.
NS records for this zone are defined at pitdc1.expedient.net.
Question and response
Question
dig mailrelay01-pub.mx.pitdc1.expedient.net. NS
Answer
The response has no answer records.
Authority
pitdc1.expedient.net. 3600 SOA auth1.dns.expedient.com. hostmaster.expedient.com. 2013050702 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0