Reverse DNS is the opposite of classic “forward” DNS, and maps an IP address to a hostname. This can be useful if, for example, you want to send emails from your server.
How to set up a reverse DNS record
1. Click Services
from the side menu.
2. Select your relevant server.
3. Click Reverse DNS
.
4. Enter the reverse DNS you want to associate with the IP address. Generally this corresponds to your hostname.