Essential
Email Header Analyzer
Parse routing and authentication clues locally from email headers.
Topic
Email and phishing
Use this topic for suspicious emails, sender clues, email headers, mail-auth DNS records, domain spoofing risk, and awareness practice.
Essential
SPF / DKIM / DMARC Checker
Look up mail authentication records for a domain.
Guide
Source Confidence Explainer
Keep phishing and advisory claims caveated until evidence supports them.
Practice
Phish Or Legit
Practice suspicious-email decisions with fictional messages.
Advanced
Website and Domain Security Check
Optional workflow when email posture is part of a broader domain review.