mx.pipeabout.com has no NS records.
NS records for this zone are defined at pipeabout.com.
NS records for this zone are defined at pipeabout.com.
Question and response
Question
dig mx.pipeabout.com. NS
Answer
The response has no answer records.
Authority
pipeabout.com. 3600 SOA dns.pipeabout.com. hostmaster.pipeabout.com. 1257407999 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0