ns2.namesvr.net has no MX records.
Question and response
Question
dig ns2.namesvr.net. MX
Answer
The response has no answer records.
Authority
namesvr.net. 3600 SOA ns1.namesvr.net. root.namesvr.net. 2010080616 3600 300 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0