Reverse DNS – What is it?
Reverse DNS or, for short rDNS maps an IP address to its corresponding domain name. It acts in the opposite direction of Forward DNS, where the domain name points to the corresponding IP address. Typically rDNS is offered by DNS hosting providers as an additional service. However, when you decide to use it, you should also create a Master Reverse zone and PTR records. Thanks to them, you will be capable of providing proof that the exact IP address and your domain name actually match.
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DNS PTR record is one of the essential DNS records. It is one of the few that deserve proper attention. So let’s explain a little bit more and get to know why it is so important.
DNS PTR record – meaning
The DNS PTR record has a specific purpose. It is to point the IP address to the domain name. Therefore, it can operate successfully both with IPv4 and IPv6 addresses. Furthermore, this type of DNS record makes it possible for you to achieve Reverse DNS.
Receiving mail servers want to verify the source of an email. For this matter, they will do a DNS Reverse lookup, and they will investigate for PTR records. DNS PTR record makes it possible to guarantee that the IP address truly belongs to the domain name.
Detailed article about PTR Record configuration
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