ssp.as42831.net has no MX records.
Question and response
Question
dig ssp.as42831.net. MX
Answer
The response has no answer records.
Authority
as42831.net. 86400 SOA ns1.ukservers.com. support.desk.ukservers.com. 2026022400 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0