smtp06.lidc.telus.com has no CNAME records.
Question and response
Question
dig smtp06.lidc.telus.com. NS
Answer
The response has no answer records.
Authority
lidc.telus.com. 2277 SOA pri1.dns.ca.telus.com. hostmaster.dco.psi.ca. 2023102006 28800 1800 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0