← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: The complete engineering implementation guide for MTA-STS, TLS-RPT, and DANE: eliminating STARTTLS downgrade attacks, deploying strict transport policies, and monitoring TLS delivery health. Transport Standard RFC 8461 MTA-STS Mandatory TLS policy enforcement […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: The definitive engineering runbook for RFC 8058 One-Click Unsubscribe: avoiding fatal GET request traps, configuring HTTP POST endpoints, and ensuring 2026 Google & Yahoo compliance. RFC Standard RFC 8058 POST Action One-Click […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: Engineering comparison of enterprise Email Security Gateways (ESGs): Proofpoint, Mimecast, Barracuda, and Cisco IronPort deliverability impact, graymail filters, and reputation scoring. ESG Coverage Top 4 Gateways Audited Proofpoint, Mimecast, Barracuda, Cisco Filter […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: State-of-the-art technical defenses against email phishing in 2026: deploying strict DMARC, anti-typosquatting algorithms, BIMI verification, and zero-trust inbound mailflow controls. Domain Defense Enforced DMARC p=reject 100% direct domain protection Visual Trust BIMI […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: The definitive architectural guide to enterprise email security: outbound TLS hardening, 2048-bit DKIM key rotation, SSH and API credential vaulting, and open relay prevention. Encryption Wire Enforced TLS 1.3 Cryptographic transport standard […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: Engineering and operational compliance guide for the US CAN-SPAM Act: Header accuracy, subject-line transparency, physical postal address validation, and automated unsubscribe handling. Header Integrity Zero Deceptive Routing Strict RFC 5322 header alignment […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: A technical incident response runbook for DMARC forensics: ingesting RFC 6591 Failure (RUF) reports, isolating malicious senders, and remediating unauthorized infrastructure spoofing. Forensic Format RFC 6591 ARF Standard Real-time incident payload parsing […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: Technical engineering guide to Business Email Compromise (BEC) prevention: mitigating executive impersonation, display-name spoofing, strict DMARC enforcement, and mailflow security. DMARC Enforcement p=reject Strict 100% domain spoofing elimination Attack Vector Display-Name Spoof […]
← Email Security Guides EXECUTIVE ENGINEERING BRIEFING Published: October 2026 • Author: Fred Dawson • Advanced Protocol Security & Cryptographic Transport Executive Summary: The complete legal and technical compliance runbook for high-volume senders: navigating CAN-SPAM, CASL, and GDPR consent standards, mandatory disclosures, and suppression synchronization. Opt-In Standard Explicit vs Opt-Out GDPR & CASL double opt-in […]