A PTR record, or Pointer Record, is a type of DNS record that resolves an IP address to a domain name, the reverse of the more common A record, which maps a domain name to an IP address. PTR records are used in reverse DNS lookups, primarily for security and anti-spam purposes. They are important for verifying the legitimacy of an IP address, ensuring that it matches the intended domain name. This is particularly vital in email communication to prevent email spoofing.
