How to set PTR record in Plesk with Amazon Route 53 extension?
PTR records should not be in DNS zone. They should be in reverse DNS zone.
According to official documentation:
If you're using Elastic IP addresses for your servers, create an A resource record set that points to the correct Elastic IP address, and use the Request to Remove Email Sending Limitations form. Make sure to specify each domain name and the corresponding Elastic IP address.
If you're using non-AWS resources and your IP addresses belong to a third party (for example, another cloud service), use the method provided by the owner of your IP addresses to configure reverse DNS. In some cases, the owner of the IP addresses will have to set up reverse DNS for you. In addition, use the method provided by the domain registrar to update the domain with the name servers for the Route 53 hosted zone.