124.217.in-addr.arpa has no MX records.
Question and response
Question
dig 124.217.in-addr.arpa. MX
Answer
The response has no answer records.
Authority
124.217.in-addr.arpa. 86400 SOA minerva.ttd.net. hostmaster.ttd.net. 2025012409 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0