as112.arpa has no MX records.
Question and response
Question
dig as112.arpa. MX
Answer
The response has no answer records.
Authority
as112.arpa. 3600 SOA sns.dns.icann.org. noc.dns.icann.org. 2022091715 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0