mx4.viawest.net has no MX records.
Question and response
Question
dig mx4.viawest.net. MX
Answer
The response has no answer records.
Authority
viawest.net. 3600 SOA ns1.viawest.net. hostmaster.viawest.net. 2025111000 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0