home4.cgocable.net has no MX records.
Question and response
Question
dig home4.cgocable.net. MX
Answer
The response has no answer records.
Authority
home4.cgocable.net. 86400 SOA maul.cogeco.net. vader.cogeco.net. 2005084531 1800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0