vocus.au has no MX records.
Question and response
Question
dig vocus.au. MX
Answer
The response has no answer records.
Authority
vocus.au. 86400 SOA ns1.iprimus.com.au. root.iprimus.com.au. 2023102808 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0