serverox07.oxcyon.com has no MX records.
Question and response
Question
dig serverox07.oxcyon.com. MX
Answer
The response has no answer records.
Authority
oxcyon.com. 300 SOA ns.rackspace.com. hostmaster.rackspace.com. 1771863725 3600 300 1814400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0