Reverse DNS Lookup

Reverse DNS lookup – is an appeal to a special domain zone to determine the domain by its IP address using a PTR record (or colloquially «Record in the reverse zone»).

This record is often used to improve the quality of email delivery with a return address belonging to your domain. It allows the recipient to verify that the email was indeed sent from the claimed domain.

For example, you own the domain example.com and want to send emails using a script with the return address admin@example.com, and you also want your email not to end up in spam. For this, you need to contact the company from which you rent hosting and ask them to make a record in the reverse zone for the domain example.com. Such a record will improve the quality of your email delivery.

To determine the IP address of your site, you can use the service Check DNS Records