This allows cybercriminals to fraudulently obtain the recipient's sensitive information like credit card details and/or password. Why SPFĮmail was not designed to be a secure communication platform - anyone can send emails that appear to have originated from any particular domain. In 2014 IETF published SPF as a 'proposed standard' in RFC 7208.

In 2006, the SPF RFC was published as experimental RFC 4408. The community then returned to the original version of SPF. In early 2004, the IETF tried to use SPF and Microsoft's CallerID proposal as the basis for what is now known as Sender ID but it went nowhere due to technical and licensing conflicts. In 2003, Meng Weng Wong merged the RMX and DMP specifications to form what ultimately became SPF.

Later, proposals like 'Reverse MX' (RMX) by Hadmut Danisch, and 'Designated Mailer Protocol' (DMP) by Gordon Fecyk were submitted to the IETF Anti-Spam Research Group (ASRG). The concept of SPF was first mentioned in 2000. SPF is defined in RFC 7208, and more information can be found at History of SPF SPF enables the receiving email server to check that an email claiming to come from a specific domain indeed comes from an IP address authorized by that domain's administrator. Sender Policy Framework (SPF) is an email authentication mechanism which allows only authorized senders to send on behalf of a domain, and prevents all unauthorized users from doing so.

You will be able to implement SPF within your organization based on this SPF guide. We will cover the various concepts of SPF, how it works, hands-on setup instructions in typical scenarios, and more. We are going to present a comprehensive guide to SPF in this article. It helps prevent emails from unauthorized senders from landing in the inbox. Sender Policy Framework (SPF) plays an important role in modern-day email authentication, along with DMARC and DKIM.

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