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Email Security

Comprehensive guides on protecting email accounts and infrastructure from cyber threats. Covers email authentication protocols like SPF, DKIM, and DMARC, encryption best practices, spam filtering, and organizational policies that reduce the risk of email-based attacks.

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PayPal DocuSign Phishing

PayPal DocuSign Phishing: How Attackers Exploit Trust

A Legitimate Invoice From PayPal — That's Also a Scam In late 2024, security researchers at Avanan documented a campaign where threat actors sent real PayPal invoices to victims — not spoofed emails, not lookalike domains, but actual invoices generated through PayPal's own platform. The emails passed every

Carl B. Johnson Jun 09, 2026 5 min read
Spear Phishing

What Is Spear Phishing? The Targeted Attack Behind Major Breaches

A Single Email Cost This Company $100 Million In 2015, Ubiquiti Networks disclosed that threat actors used carefully crafted emails impersonating company executives to trick finance employees into wiring $46.7 million to overseas accounts. The attackers didn't exploit a software vulnerability. They exploited people — with spear phishing.

Carl B. Johnson Jun 07, 2026 5 min read
Spear Phishing

Spear Phishing: Why Targeted Attacks Beat Your Defenses

The Email That Cost One Company $100 Million In 2024, the FBI's Internet Crime Complaint Center reported that business email compromise — a form of spear phishing — accounted for over $2.9 billion in adjusted losses. That wasn't a typo. Billions. And those are just the cases

Carl B. Johnson Jun 07, 2026 5 min read
AI Phishing Attacks

FBI Warns Gmail Users of AI-Driven Phishing Attacks

In late 2024, the FBI issued a stark warning: AI-driven phishing attacks targeting Gmail users had reached a level of sophistication that made them nearly indistinguishable from legitimate communications. We're not talking about the laughably bad "Nigerian prince" emails anymore. These are pixel-perfect replicas of Google

Carl B. Johnson Jun 06, 2026 5 min read
Fake Email

Fake Email: How to Spot, Stop, and Survive One

A Single Fake Email Cost Facebook and Google $100 Million Between 2013 and 2015, a Lithuanian man named Evaldas Rimasauskas sent a series of fake email messages to employees at Facebook and Google. He impersonated a legitimate hardware vendor, attached fraudulent invoices, and directed payments to bank accounts he controlled.

Carl B. Johnson Jun 03, 2026 6 min read
Spear Phishing

Spear Phishing: Why Targeted Attacks Bypass Your Defenses

In January 2024, a finance employee at a multinational engineering firm in Hong Kong wired $25 million to threat actors after a video call with what appeared to be the company's CFO. The call was a deepfake. But the attack started weeks earlier — with a single spear phishing

Carl B. Johnson Jun 02, 2026 5 min read
Phishing

What Is Phishing? A Security Pro's Real-World Guide

In 2023, the FBI's Internet Crime Complaint Center received over 298,000 phishing complaints — making it the most reported cybercrime category for the fifth consecutive year. And those are just the ones people actually reported. If you're asking what is phishing, you're asking the

Carl B. Johnson May 30, 2026 6 min read
Fake Mail

Fake Mail: How Threat Actors Exploit Your Inbox in 2026

The $4.88 Million Problem Sitting in Your Inbox Right Now In 2024, the FBI's Internet Crime Complaint Center reported that business email compromise — essentially sophisticated fake mail — cost victims over $2.9 billion in a single year. That wasn't a spike. It was a trend.

Carl B. Johnson May 28, 2026 5 min read
Phish Tour

Phish Tour: Mapping the Anatomy of a Phishing Attack

Welcome to the Phish Tour: How a Single Email Becomes a Full-Blown Breach In March 2023, the FBI's IC3 received over 298,000 complaints related to phishing schemes — more than any other cybercrime category by a wide margin. That number has only climbed since. Yet most people still

Carl B. Johnson May 24, 2026 5 min read