lxapp3002.telstra.net has no MX records.
Question and response
Question
dig lxapp3002.telstra.net. MX
Answer
The response has no answer records.
Authority
telstra.net. 6400 SOA dns0.telstra.net. hostmaster.telstra.net. 2021177277 10800 3600 604800 6400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0