44.255.160.192.in-addr.arpa.clearcable.ca has no MX records.
Question and response
Question
dig 44.255.160.192.in-addr.arpa.clearcable.ca. MX
Answer
The response has no answer records.
Authority
clearcable.ca. 3600 SOA ns1.clearcable.ca. hostmaster.clearcable.ca. 1772868834 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0