Checking the write in the reverse zoneChecks records in the reverse zone for an IP address.
Reverse lookup DNS – This is an appeal to a special domain zone to determine a domain by its IP address using a PTR record (or in common parlance «Record in the reverse zone.»).
This entry is very often used to increase the quality of email delivery with a return address belonging to your domain. It allows the recipient to check that the letter was actually sent from the declared domain.
For example, you are the owner of the example.com domain and want to send email using a script with the return address email@example.com, and you also want your letter not to end up in spam. To do this, you need to contact the company from which you rent hosting and ask to make an entry in the reverse zone for the example.com domain. This entry will improve the quality of your email delivery.
To determine the IP address of your website, you can use the service Checking DNS records