mx1.webnames.ca has no CNAME records.
Question and response
Question
dig mx1.webnames.ca. NS
Answer
The response has no answer records.
Authority
webnames.ca. 3092 SOA ns1.webnames.ca. postmaster.webnames.ca. 2025100307 3600 900 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0