host2.cntech.net has no MX records.
Question and response
Question
dig host2.cntech.net. MX
Answer
The response has no answer records.
Authority
cntech.net. 900 SOA host1.cntech.net. webmaster.cntech.net. 2022012706 10800 1800 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0