Phishing vs spear phishing: what's the difference in 2026?
Phishing targets the masses, spear phishing targets the person. In 2026, AI, OSINT, and deepfakes blur the line. Full breakdown with real cases and defenses.
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May 2026
April 2026
HSTS: the complete guide to enable Strict-Transport-Security and the preload list
HSTS (RFC 6797) forces browsers to contact your site only over HTTPS. This guide covers the protocol, the directives, per-stack configurations and how to submit to the Chrome preload list.
Cloudflare Email Service: Email Routing, Security, and DMARC Management explained
Cloudflare now covers 4 email layers: free Email Routing, transactional Email Service (public beta April 2026), anti-phishing Email Security (formerly Area 1), and DMARC Management. Complete guide covering architecture, DNS, Proofpoint/Mimecast comparison, and pricing.
Cisco Secure Email Cloud Gateway (CES): SaaS architecture, iphmx.com DNS and ESA migration
Cisco Secure Email Cloud Gateway (CES) is Cisco's primary SaaS offering in 2026, the successor to the legacy ESA appliances inherited from Ironport. Complete guide: CES onboarding, iphmx.com MX records by region (NA/EU/APJ), SPF/DKIM/DMARC, migration from ESA to CES, 2024-2025 Gartner Magic Quadrant exit, zero-day CVE-2025-20393, comparison with Proofpoint, Mimecast, Defender and Abnormal.
Abnormal Security: behavioral AI, API deployment, and email gateway alternatives
Abnormal Security is an API-native ICES platform that detects BEC, VEC, and Account Takeover attacks using behavioral AI, with no MX change required. Complete guide: Attune 1.0 architecture, Proofpoint/Mimecast/Defender comparison, limitations, and DNS record audit.
Proofpoint Secure Email Gateway: architecture, DNS configuration and alternatives
Proofpoint is the enterprise SEG benchmark, used by 87 of the Fortune 100. Complete guide: Nexus AI architecture, TAP, SPF/DKIM/DMARC configuration, the 2024 EchoSpoofing incident and a comparison with Mimecast, Microsoft Defender and Abnormal Security.
Mimecast Secure Email Gateway: how it works, DNS setup, and alternatives
Mimecast is a cloud email gateway (SEG) that intercepts all traffic via MX redirection. Full guide: architecture, SPF/DKIM/DMARC setup, Proofpoint/Abnormal Security comparison, and DNS audit.
VMC and CMC Certificates for BIMI: How to Choose, Buy and Deploy
Complete guide to obtaining and deploying a VMC or CMC certificate: CA comparison, pricing, prerequisites and free hosting.
March 2026
Understanding email headers: the complete guide to reading and analyzing every field
Every email carries an invisible logbook. This guide teaches you how to extract it, read it field by field, and diagnose deliverability or security issues.