apmail2.westcon.com.au has no CNAME records.
Question and response
Question
dig apmail2.westcon.com.au. NS
Answer
The response has no answer records.
Authority
westcon.com.au. 1452 SOA ns3.westcon.com. dnsadmin.westcon.com. 2025072801 43200 600 2419200 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0