essx.netins.net has no MX records.
Question and response
Question
dig essx.netins.net. MX
Answer
The response has no answer records.
Authority
essx.netins.net. 86400 SOA ns3k.aureon.com. hostmaster.netins.net. 199906032 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0