Analyzing Email Headers for Phishing Investigation When to Use - When investigating a suspected phishing email to determine its true origin - For verifying sender authenticity and detecting email spoofing - During incident response when a user has clicked a phishing link - When tracing the delivery path and relay servers of a suspicious email - For validating SPF, DKIM, and DMARC alignment to identify forgery Prerequisites - Raw email headers from the suspicious message (EML or MSG format) - Understanding of SMTP protocol and email header fields - Access to DNS lookup tools (dig, nslookup) fo…