mx03.gologic.com.au has no CNAME records.
Question and response
Question
dig mx03.gologic.com.au. NS
Answer
The response has no answer records.
Authority
gologic.com.au. 810 SOA ns-19.awsdns-02.com. awsdns-hostmaster.amazon.com. 2 7200 900 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0