title: Reverse DNS and PTR records on Cloudflare
body: <p>I have server with a mail service running at domain o1.danilocarneiro.com. I use Cloudflare as DNS, so I have configured an A record on cloud flare to 152.67.52.238. This is actually the IP of the server.</p>
  <p>The problem is because while running mail-tester.com check it warns about Reverse DNS and recommends to add PTR record. My first question is where should I add this record, I guess it's in Cloudflare but I'm really not an expert on DNS and network subjects.</p>
  <p><a href="https://i.stack.imgur.com/G8CLD.png" rel="nofollow noreferrer">Cloudflare PTR record</a></p>
  <p>I'd like to know how to create this record, I have tried a record with: Name: o1.danilocarneiro.com. Domain name: 238.52.67.152-in-addr-arpa. It doesn't work.</p>
  <p>I also tried. Name: 152.67.52.238. Domain name: o1.danilocarneiro.com. It also doesn't work. Mail-teser and other checkers like mxtoolbox.com keeps saying PTR record not found.</p>
  <p>Could anyone please explain to me or demonstrate how to create a valid PTR record for my mail server (o1.danilocarneiro.com -&gt; 152.67.52.238)</p>
  <p>Thank you so much!</p>