mx.crm.orionondemand.com.
Question and response
Question
dig 73.65-123.139.151.66.in-addr.arpa. PTR
Answer
73.65-123.139.151.66.in-addr.arpa. 3600 PTR mx.crm.orionondemand.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0