cogeco-network.cogeco.net has no MX records.
Question and response
Question
dig cogeco-network.cogeco.net. MX
Answer
The response has no answer records.
Authority
cogeco.net. 300 SOA ns1.cgocable.net. dnsadmin.cgocable.net. 2008205302 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0