Question and response
Question
dig smtp.ispworks.net. PTR
Answer
The response has no answer records.
Authority
ispworks.net. 1800 SOA liz.ns.cloudflare.com. dns.cloudflare.com. 2397134119 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0