md1.csmaildealer.com.
Question and response
Question
dig 180.SUB176.23.212.202.in-addr.arpa. PTR
Answer
180.sub176.23.212.202.in-addr.arpa. 300 PTR md1.csmaildealer.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0