corp-smtp.dodo.com.au has no CNAME records.
Question and response
Question
dig corp-smtp.dodo.com.au. NS
Answer
The response has no answer records.
Authority
dodo.com.au. 301 SOA ns1.dodo.com.au. hostmaster.dodo.com.au. 2026030301 1200 1209600 1200 301
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0