Email Security Tools
Email security tools help protect organizations from phishing, spoofing, spam, and misconfigurations. These tools support authentication standards like SPF, DKIM, and DMARC, and provide visibility into email routing and security posture.
MXToolbox
MXToolbox provides DNS, MX, SPF, DKIM, and blacklist lookups for email infrastructure. It helps diagnose deliverability issues and detect misconfigurations.
Why it’s useful: Teaches how email authentication works and how attackers exploit weak DNS and mail server settings.
Difficulty: Beginner
DMARC Analyzer (Free Tools)
DMARC Analyzer provides tools for validating DMARC, SPF, and DKIM configurations. It helps organizations enforce email authentication policies.
Why it’s useful: Shows how DMARC protects domains from spoofing and phishing attacks.
Difficulty: Beginner
GoPhish
GoPhish is an open-source phishing simulation platform that allows organizations to test user awareness and train employees against phishing attacks.
Why it’s useful: Helps learners understand phishing techniques and how awareness programs reduce risk.
Difficulty: Intermediate
SpamAssassin
SpamAssassin is an open-source spam filtering platform that uses rules, heuristics, and machine learning to detect unwanted email.
Why it’s useful: Shows how spam detection works and how attackers attempt to bypass filters.
Difficulty: Intermediate
MailHeader Analyzer
MailHeader Analyzer tools decode and analyze email headers to reveal routing paths, authentication results, and potential spoofing indicators.
Why it’s useful: Teaches how to trace email origins and identify forged or suspicious messages.
Difficulty: Beginner