site has no MX records.
Question and response
Question
dig site. MX
Answer
The response has no answer records.
Authority
site. 900 SOA ns0.centralnic.net. hostmaster.centralnic.net. 423303 900 1800 6048000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0