19.14.234.205.in-addr.arpa.
Question and response
Question
dig qsmtp.metricstream.com. PTR
Answer
qsmtp.metricstream.com. 3600 PTR 19.14.234.205.in-addr.arpa.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0