filter2.corp.mxs.au has no MX records.
Question and response
Question
dig filter2.corp.mxs.au. MX
Answer
The response has no answer records.
Authority
mxs.au. 900 SOA ns1.corp.ventraip.net.au. servers.vip-servers.com. 2026013108 3600 1800 1209600 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0