154.154.149.in-addr.arpa has no MX records.
Question and response
Question
dig 154.154.149.in-addr.arpa. MX
Answer
The response has no answer records.
Authority
154.154.149.in-addr.arpa. 3600 SOA ns1.edis.global. root.edis.at. 2026030207 10800 900 604800 86400
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0