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Koh Cyber
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Security insights from Koh Cyber

Threat intelligence, product updates, and practical email security guidance for Google Workspace admins.

Threat Intelligence

Why Post-Delivery Detection Wins Against BEC

Business Email Compromise attacks are carefully crafted to evade pre-delivery filters. Here's why scanning after delivery — with real authentication data — catches what others miss.

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Security Education

DMARC Is Not Enough: The Gaps Attackers Exploit

DMARC p=reject stops spoofed domains but leaves lookalike domains, display-name fraud, and reply-to hijacks wide open. We break down the gaps and how to close them.

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Guide

The Complete Google Workspace Email Security Guide for 2026

Google's built-in filters catch commodity spam. They don't catch targeted BEC, lookalike domains, or zero-day phishing. This guide covers what Google does — and doesn't — protect you from.

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