unknown.scnet.net has no MX records.
Question and response
Question
dig unknown.scnet.net. MX
Answer
The response has no answer records.
Authority
scnet.net. 3600 SOA ns1.servercentral.net. hostmaster.servercentral.net. 2026022216 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0