dns48.telus.ca has no MX records.
Question and response
Question
dig dns48.telus.ca. MX
Answer
The response has no answer records.
Authority
telus.ca. 3600 SOA dns48.telus.com. dnsadmin2.telus.com. 2019275734 900 90 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0