ns3.nshost2.net has no MX records.
Question and response
Question
dig ns3.nshost2.net. MX
Answer
The response has no answer records.
Authority
nshost2.net. 3600 SOA ns1.nshost2.de. hostmaster.webhostone.de. 2011050185 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0