192.136.160.1.reverse.uninets.net has no MX records.
Question and response
Question
dig 192.136.160.1.reverse.uninets.net. MX
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT [{Extended_DNS_Error: NOT_AUTHORITATIVE: Not Authoritative}] ; payload 1280, xrcode 0, version 0, flags 0