64.231.131.213.static.inetbone.net has no MX records.
Question and response
Question
dig 64.231.131.213.static.inetbone.net. MX
Answer
The response has no answer records.
Authority
inetbone.net. 300 SOA ns1.inetbone.net. hostmaster.inetbone.net. 2026021901 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0