TUESDAY · 19 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 Tuesday, May 19, 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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SPF Record Exceeding 10 DNS Lookups: Flattening and Optimization Fixes

SPF Record Exceeding 10 DNS Lookups: Flattening and Optimization Fixes

Solve SPF's 10 DNS lookup limit with proven record flattening and optimization techniques. Step-by-step guide to prevent PermError failures.

7 min read
Decoding DMARC Aggregate Reports: Complete Analysis Guide for Security Teams

Decoding DMARC Aggregate Reports: Complete Analysis Guide for Security Teams

Master DMARC aggregate report analysis with step-by-step breakdowns, practical interpretation examples, and advanced techniques for security teams.

7 min read
TLS-RPT Analysis: Why Email Encryption Fails and How to Fix It

TLS-RPT Analysis: Why Email Encryption Fails and How to Fix It

Discover why email encryption fails through TLS-RPT analysis. Learn to identify patterns, troubleshoot SMTP TLS issues, and implement systematic remediation…

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
D
Section D · Leaders' Forum

IT & Security Leadership

All essays

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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