bosdc1.expedient.net has no MX records.
Question and response
Question
dig bosdc1.expedient.net. MX
Answer
The response has no answer records.
Authority
bosdc1.expedient.net. 3600 SOA auth1.dns.expedient.com. hostmaster.expedient.com. 2012102303 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0