mail.connections.ca has no CNAME records.
Question and response
Question
dig mail.connections.ca. NS
Answer
The response has no answer records.
Authority
connections.ca. 2981 SOA ns1.gtt.net. dnsadmin.gtt.net. 2026030501 10800 3600 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0