PTR, once important for email authentication within SPF (Sender Policy Framework), has lost significance over the years. Instead of providing value, it now introduces errors, delays, and inconveniences. The mechanism has been deprecated due to its drawbacks, including slowing down the authentication process, causing errors, and increasing the load on name servers. SPF offers alternative mechanisms like 'A,' 'MX,' 'IPv4,' 'IPv6,' and 'include' to replace PTR. Additionally, implementing DMARC, combining SPF and DKIM, is recommended for robust email authentication and enhanced security. Regular monitoring of DMARC reports is essential for comprehensive insights into email traffic.

Why Should You Avoid SPF PTR?

DMARC Report