ns2012.hexonet.net has no MX records.
Question and response
Question
dig ns2012.hexonet.net. MX
Answer
The response has no answer records.
Authority
hexonet.net. 60 SOA ns1012.hexonet.net. support.hexonet.net. 2025072801 86400 7200 604800 60
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0