ns3.wpx.net has no MX records.
Question and response
Question
dig ns3.wpx.net. MX
Answer
The response has no answer records.
Authority
wpx.net. 38400 SOA ns1.wpx.net. root.v1.wpx.net. 2026022307 10800 3600 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0