net.cogeco.ca has no MX records.
Question and response
Question
dig net.cogeco.ca. MX
Answer
The response has no answer records.
Authority
net.cogeco.ca. 86400 SOA ns4.cgocable.net. dnsadmin.cgocable.net. 1138 1800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0