Sender Policy Framework (SPF) is a widely used email authentication protocol that helps prevent email fraud and spoofing. It works by allowing email recipients to verify that the sender of an email is authorized to send messages on behalf of a particular domain. This is achieved by checking the sender’s IP address against a list of authorized IP addresses published in the domain’s DNS records. SPF helps protect against phishing attacks and ensures that emails are delivered from legitimate sources, providing a more secure and trustworthy email experience for users. By implementing SPF, organizations can improve their email deliverability and protect their brand reputation.