mail-lb.aussiebb.com.au has no CNAME records.
Question and response
Question
dig mail-lb.aussiebb.com.au. NS
Answer
The response has no answer records.
Authority
aussiebb.com.au. 3600 SOA ns1.wide.net.au. hostmaster.wide.net.au. 2026022002 3600 900 2400000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0