Question and response
Question
dig mx.chenyang-crgfts.com. PTR
Answer
The response has no answer records.
Authority
chenyang-crgfts.com. 3600 SOA dns.chenyang-crgfts.com. hostmaster.chenyang-crgfts.com. 1914665247 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0