Email Security Blog
Guides, tutorials, and news about email authentication and security.
DKIM Explained: How Email Signatures Protect Your Domain
DKIM is the piece of email authentication most people skip over. Here's what it does, why it matters for deliverability, and how to set it up correctly.
Understanding DMARC: A Complete Guide
Learn what DMARC does for your business, how it protects your domain from impersonation, and how to implement it step by step.
SPF Record Best Practices for 2026
The most common SPF mistakes we see, and how to fix them before they silently break your email delivery.
Why MTA-STS Matters More Than You Think
Your emails might be traveling unencrypted without you knowing. MTA-STS closes that gap. Here's how.
Safely Moving to DMARC Reject
A practical roadmap for tightening your DMARC policy from monitoring to full enforcement, without breaking email delivery.
Email Security for Hosting Providers
Managing email security across hundreds of client domains is a different challenge. Here's how to do it systematically.
Introducing MailShield Security Scoring
One number that tells your team where you stand. Learn how our scoring system works and how to improve your grade.
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