ipt-mailgate-01.m2core.com.au has no CNAME records.
Question and response
Question
dig ipt-mailgate-01.m2core.com.au. NS
Answer
The response has no answer records.
Authority
m2core.com.au. 5030 SOA ns1.m2core.com.au. hostmaster.m2core.com.au. 2025092905 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0