mx.192.174.217.in-addr.arpa has no MX records.
Question and response
Question
dig mx.192.174.217.in-addr.arpa. MX
Answer
The response has no answer records.
Authority
192.174.217.in-addr.arpa. 86400 SOA ns2.agarik.com. dns-admin.agarik.com. 2025100201 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0