Email Security
Learning Center
Master the art of reading headers, understanding authentication, and spotting modern threats.
Take the Security QuizTechnical Guides
Master the tools of email forensics.
How to Read Email Headers (Ultimate Guide)
A step-by-step guide to finding and reading headers in Gmail, Outlook, and Apple Mail.
SPF, DKIM, DMARC Explained
The "Holy Trinity" of email security. Understand how they work together to prevent spoofing.
How to Trace an Email IP Address
Learn how to read the "Received" header chain to find the true geographic origin of an email.
What Does "SPF Soft Fail" Mean?
Why your emails might be marked as "Neutral" and the difference between ~all and -all.
Gmail Red Padlock: StartTLS Explained
Why Gmail warns you that "messages to this sender might not be private".
Threat Analysis
Understand the tactics attackers use.
Business Email Compromise (BEC)
The $50 billion scam where attackers impersonate CEOs to steal wire transfers.
Display Name Spoofing Guide
Why "From: Microsoft Support" might actually be just a free Gmail account.
Typosquatting & Homograph Attacks
When "google.com" isn't Google. How hidden characters trick your eyes.
The Danger of .HTML Attachments
Why you should never open an HTML file attached to a voicemail or fax notification.
Why Legitimate Emails Go to Spam
A guide for business owners: 5 reasons your emails are being blocked.
Case Studies & Security
Real-world examples and verifiable proof.
Anatomy of a Fake Invoice
We dissect a real phishing email to show you exactly how the psychological triggers work.
Netflix "Account Suspended" Scam
Analyzing the mass-market attack targeting millions of consumers.
AI Phishing & ChatGPT Risks
Why bad grammar is no longer a reliable indicator of a scam.
I Clicked a Link: Incident Response
Step-by-step: What to do immediately if you think you fell for a phishing scam.
What is BIMI? (The Blue Checkmark)
The future of email identity: Verified Mark Certificates and brand logos.