tech has no MX records.
Question and response
Question
dig tech. MX
Answer
The response has no answer records.
Authority
tech. 900 SOA ns0.centralnic.net. hostmaster.centralnic.net. 1597770 900 1800 6048000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0