ns3.monkeybrains.net has no MX records.
Question and response
Question
dig ns3.monkeybrains.net. MX
Answer
The response has no answer records.
Authority
monkeybrains.net. 7200 SOA ns2.monkeybrains.NET. support.monkeybrains.NET. 2026012900 7200 1200 1209600 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0