zaue1psmtpap02.cch.com.au has no MX records.
Question and response
Question
dig zaue1psmtpap02.cch.com.au. MX
Answer
The response has no answer records.
Authority
cch.com.au. 1800 SOA edns9.ultradns.biz. gbsnetworkoperations.wolterskluwer.com. 2017041936 10800 1800 1814400 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0