Question and response
Question
dig emailsrvr.com. PTR
Answer
The response has no answer records.
Authority
emailsrvr.com. 600 SOA pdns219.ultradns.com. postmaster.emailsrvr.com. 2016053250 3600 600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0