SUNDAY · 03 MAY · 2026
The Authentication Journal

Skysnag
Intelligence

Fortis per veritatem — strong through verification.
Protocols & Standards DMARC · SPF · DKIM · MTA-STS · BIMI
Threat & Defense BEC · Phishing · Lookalikes · Forensics
Compliance NIS2 · DORA · PCI · SOC 2 · HIPAA
Practice & Channel MSP · Case Files · Dispatches
Front Page Sunday, May 3, 2026
Gmail vs Outlook Deliverability: Key Differences You Need to Know

Gmail vs Outlook Deliverability: Key Differences You Need to Know

Gmail and Outlook use different filtering algorithms and authentication requirements. Learn platform-specific optimization strategies to maximize deliverability.

Filed 21 Apr 2026 · 6 min read

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A
Section A · Protocols & Practice

Authentication & Deliverability

The standards that prove who you are — and the practices that keep you in the inbox.

Email Authentication & Standards

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What Is DMARC? How Email Authentication Works in 2026

What Is DMARC? How Email Authentication Works in 2026

Learn DMARC fundamentals: how email authentication works, implementation steps, and protection against spoofing in 2026. Complete guide for security teams.

8 min read
DMARC Subdomain Policy: Protection Beyond Root Domain

DMARC Subdomain Policy: Protection Beyond Root Domain

Master DMARC subdomain policies and sp tag configuration for comprehensive email security beyond root domains. Expert implementation guide.

6 min read
Google Yahoo Email Requirements 2026: Complete Compliance Guide for Bulk Senders

Google Yahoo Email Requirements 2026: Complete Compliance Guide for Bulk Senders

Master Google and Yahoo's latest email authentication requirements for 2026. Complete guide to SPF, DKIM, and DMARC compliance for bulk…

6 min read

Email Deliverability & Best Practices

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Inbox Placement Rate: Complete Optimization Guide

Inbox Placement Rate: Complete Optimization Guide

Maximize email inbox delivery with data-driven DMARC strategies. Complete guide to improving inbox placement rates and email deliverability optimization.

7 min read
Why Emails Go to Spam: 12 Critical Factors That Trigger Email Filters

Why Emails Go to Spam: 12 Critical Factors That Trigger Email Filters

Understanding why emails go to spam is crucial for effective digital communication. Modern filtering systems analyze hundreds of factors beyond…

10 min read
How to Fix Email Deliverability Issues in 2026: Complete Troubleshooting Guide

How to Fix Email Deliverability Issues in 2026: Complete Troubleshooting Guide

Complete troubleshooting guide for diagnosing and resolving email deliverability problems, inbox placement issues, and authentication failures in 2026.

7 min read
Elevated

In enterprise environments, maintaining control of email security depends less on individual protocols and more on clear ownership and consistent management of authentication controls.

H
Section H · The News Wire

Dispatches

The newsroom feed — Skysnag platform releases and what's moving in email security, filed as it happens.

Weekly · Every Tuesday · 06:00 GMT

The Authentication Brief.

A weekly dispatch for security leaders, MSPs, and deliverability engineers. Threat advisories, standards movement, and one piece of long-form analysis — edited by the Skysnag research group.

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