mail.wanex.net has no MX records.
Question and response
Question
dig mm.wanex.net. MX
Answer
The response has no answer records.
Authority
wanex.net. 10800 SOA main.wanex.net. hostmaster.wanex.net. 2024061000 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0