connect.com.au has no MX records.
Question and response
Question
dig connect.com.au. MX
Answer
The response has no answer records.
Authority
connect.com.au. 86400 SOA ns1.aapt.com.au. hostmaster.aapt.com.au. 2025081400 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0