hosted-by.cinfuserver.com has no MX records.
Question and response
Question
dig hosted-by.cinfuserver.com. MX
Answer
The response has no answer records.
Authority
cinfuserver.com. 7200 SOA doma226145.mars.orderbox-dns.com. hostmaster.cinfu.com. 2011122802 7200 7200 172800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0