dns3.cosentry.com has no MX records.
Question and response
Question
dig dns3.cosentry.com. MX
Answer
The response has no answer records.
Authority
cosentry.com. 3600 SOA ns1.ral.hostedsolutions.com. hostmaster.hostedsolutions.com. 2990536913 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0