154.166.62.in-addr.arpa has no MX records.
Question and response
Question
dig 154.166.62.in-addr.arpa. MX
Answer
The response has no answer records.
Authority
154.166.62.in-addr.arpa. 3600 SOA ns1.versatel.net. hostmaster.versatel.net. 2020120403 1200 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0