Email Security
Your Inbox Is the
#1 Attack Vector.
Defend It.
Defensive Networks deploys AI-powered email security from Abnormal Security — stopping BEC, phishing, and social engineering attacks that legacy gateways miss entirely.
The Problem
90% of Cyberattacks Start With an Email
Business Email Compromise cost organizations $2.7 billion in 2025. Legacy secure email gateways rely on known signatures and domain reputation — missing the AI-crafted, zero-day phishing that now dominates the threat landscape.
The Defensive Approach
AI-Powered Email Defense, Fully Managed
We deploy and manage behavioral AI that understands how your organization communicates — catching the subtle manipulation and impersonation attacks that signature-based gateways were never built to stop.
Abnormal Security AI
Behavioral AI that understands your organization's communication patterns. Detects anomalies in tone, timing, and context that gateway-based filters miss completely. Abnormal builds a baseline of every internal and external relationship — so when something is off, it knows immediately.
BEC & Impersonation Defense
Stops CEO fraud, vendor impersonation, and payroll diversion attacks. AI models baseline every sender relationship to catch social engineering in real-time.
Account Takeover Protection
Detect compromised internal accounts before they're weaponized. Behavioral analysis spots login anomalies, mail rule changes, and lateral phishing campaigns.
Email Platform Security
Full Microsoft 365 and Google Workspace security posture management. Misconfiguration detection, DLP enforcement, and compliance monitoring.
Phishing Simulation & Training
Measure employee susceptibility with realistic phishing campaigns. Targeted training for high-risk users based on real behavioral data.
How It Works
From Risk Exposed to Fully Defended in Days
API-native deployment means no mail flow disruption and no MX record changes. Full visibility in minutes — managed protection that evolves with the threat landscape.
Email Risk Assessment
We analyze your current email flow for exposed risks — BEC vulnerability, gateway gaps, and internal account hygiene. You get a clear picture of exactly where you're exposed.
Deploy Abnormal Security
API-based deployment with zero MX record changes. Full visibility in minutes, not weeks. No mail flow disruption — your users never notice the transition.
Managed Email Defense
Continuous monitoring, policy refinement, and incident response. Quarterly reviews with threat trend briefings — our team becomes an extension of yours.
Technology Partners
Best-of-Breed, Not Single Vendor Lock-In
We design across every major email security platform — selecting the right tools for each layer of your defense.
Get Started
Your Email Gateway Has Blind Spots.
We Don't.
Book a free 15-minute email risk assessment with a Defensive Networks architect. No sales pitch — just an honest look at where your email defenses are exposed.