revdns160.telus.com has no MX records.
Question and response
Question
dig revdns160.telus.com. MX
Answer
The response has no answer records.
Authority
telus.com. 3600 SOA dns40.telus.com. dnsadmin2.telus.com. 2019102513 900 7200 3600000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0