What does the PTR mechanism mean?

What does the PTR mechanism mean?

When an email receiver gets an email and the PTR mechanism is integrated in the sender’s SPF record, the receiver will look at the incoming IP address and do a “PTR” lookup. For example, if the sender is sending email from IP address 1.2.3.4, the receiver will perform a PTR lookup of 1.2.3.4 to attempt to retrieve a hostname. Lastly, if a hostname is discovered for IP address 1.2.3.4, then that hostname’s domain is compared to the domain that was originally used to lookup the SPF record.
    • Related Articles

    • What is a RUA report?

      It is an aggregated report, which gives the data of the IP, PTR( Code of the SPF record), Reporter, Location, Date, DKIM Selector, DKIM Domain and Domain.
    • How Smart SPF Works?

      TDMARC is an industry-leading cybersecurity tool, designed to monitor three standard email authentication protocols- SPF, DKIM and DMARC, for complementing the Simple Mail Transfer Protocol (SMTP). It offers the Smart SPF feature to monitor and ...
    • What is the difference between RUA and RUF reports?

      RUA reports share the information regarding an email such as its sender IP and PTR, while RUF reports share the dmarc failed report for all unauthenticated emails to the assigned email ID.
    • How to Setup SPF for Zendesk?

      This article will guide you through the process of establishing SPF for Zendesk. Setting up SPF for Zendesk can help emails pass DMARC alignment when SPF passes and aligns with the From domain, as well as boost your domain's reputation with ISPs, ...
    • What is the difference between SPF results and SPF?

      SPF Stands for Sender Policy Framework, it assists in adding restrictions on your DNS server and defines who can send email from your domain. Besides, SPF plays a vital role in preventing domain spoofing as it doesn’t allow unauthorized sources to ...