A process designed to identify and validate the authenticity of email addresses, it scrutinizes email header information and server responses to determine if an email has been sent from a legitimate source or a forged one. For example, a properly configured system can flag an email claiming to originate from a specific domain if the sending server’s IP address does not align with the domain’s published Sender Policy Framework (SPF) records.
This practice is important because it helps protect individuals and organizations from phishing attacks, malware distribution, and other forms of email-based fraud. Historically, the rise of unsolicited bulk email (spam) and increasingly sophisticated phishing schemes have driven the development and refinement of these validation techniques. The capability to accurately assess email source legitimacy minimizes risk of exposure.
