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Domain security insights, email authentication guides, and enforcement strategies.

Threat Intelligence2026-04-188 min read

SpoofSentry Threat Intelligence: From DMARC Reports to Actionable Intelligence

DMARC reports tell you what happened. Threat intelligence tells you what to do about it. Introducing IP reputation enrichment, Certificate Transparency monitoring, score forecasting, sender profiling, and STIX/TAXII export.

Threat Intelligence2026-04-185 min read

What Certificate Transparency Monitoring Catches Before DMARC Ever Sees It

CT logs reveal lookalike domain certificates hours before the first phishing email arrives. Learn how Certificate Transparency monitoring gives you an early warning system that works upstream of DMARC.

Threat Intelligence2026-04-185 min read

How Sender Behavioral Profiling Detects Compromised ESP Accounts

Static rules miss compromised senders that pass SPF and DKIM. Behavioral profiling catches anomalies in volume, timing, and authentication patterns that reveal account takeover.

Enterprise2026-04-185 min read

What STIX/TAXII Means for DMARC and Email Security Teams

DMARC data contains threat intelligence your SOC needs. STIX 2.1 and TAXII 2.1 get it into Splunk, Sentinel, and Elastic in three steps with no extra cost.

Threat Intelligence2026-04-185 min read

How to Prioritize DMARC Failures with IP Reputation Enrichment

Thousands of DMARC failures, but which ones matter? IP reputation enrichment from AbuseIPDB, Spamhaus, and Safe Browsing separates real attacks from misconfigured senders.

Analytics2026-04-185 min read

Forecasting Your Domain Security Score: How to Plan for p=reject

Enforcement planning needs trajectory, not snapshots. Score forecasting uses weighted linear regression to project your domain security posture at 30, 60, and 90 days.

Fundamentals2026-04-0812 min read

What Is DMARC? The Complete Guide for 2026

DMARC prevents email spoofing by letting domain owners control what happens when authentication fails. Learn how it works, why Google and Yahoo now require it, and how to deploy it safely.

Enforcement2026-04-0615 min read

From p=none to p=reject: A Practical Enforcement Guide

Moving to DMARC enforcement is the highest-risk step in email security deployment. This guide walks through simulation, sender classification, staged rollout, and rollback strategies.

Threat Intelligence2026-04-0310 min read

How Attackers Spoof Your Domain — and How to Stop Them

Email spoofing costs businesses $6B+ annually. Understand the attack chain, why SPF alone is not enough, and build a layered defense with DMARC, DKIM, and lookalike monitoring.

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