wp.shawcable.net has no MX records.
Question and response
Question
dig wp.shawcable.net. MX
Answer
The response has no answer records.
Authority
wp.shawcable.net. 600 SOA ns1.nr.wp.shawcable.net. dnsadmin.shaw.ca. 2179513834 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0