π Start Your Journey
Choose your path based on your current needs and expertise level
I'm New to DMARC
Understand the fundamentals of email authentication and why it matters
Start with basicsI Need to Implement
Ready to set up DMARC for your domain? Get step-by-step guidance
See DNS specificationsCommon Problems & Solutions
Click on any issue you're experiencing to find the right documentation
Emails Going to Spam
Learn why emails fail authentication and how to fix delivery issues
Domain Being Spoofed
Understand email vulnerabilities and how to protect your domain
SPF Record Issues
Master SPF configuration and understand its limitations
DKIM Signature Problems
Fix DKIM signing issues and understand key management
π Complete Documentation Library
Deep dive into every aspect of email authentication and security
Introduction to DMARC
Understand what DMARC is, how it works, and why every domain owner needs it for email security.
- DMARC fundamentals
- How alignment works
- Policy enforcement
DMARC DNS Specifications
Complete technical guide to DMARC record syntax, tags, and proper DNS configuration.
- Record syntax & tags
- Policy configuration
- RUA/RUF reporting
Why DMARC Was Developed
The history and motivation behind DMARC creation and its role in combating email fraud.
- Email fraud history
- Industry collaboration
- DMARC benefits
History of Email Vulnerabilities
Evolution of email threats and how authentication standards developed to combat them.
- Email threat timeline
- Attack techniques
- Security evolution
SMTP Limitations & Open Relays
Understanding SMTP protocol weaknesses and how open relays enable email abuse.
- SMTP vulnerabilities
- Open relay risks
- Security measures
SPF: Strengths & Weaknesses
Complete guide to SPF records, common pitfalls, and the 10-lookup limit challenge.
- SPF mechanisms
- Common mistakes
- Optimization tips
DKIM: Strengths & Weaknesses
Master DKIM signatures, key management, and selector strategies for email authentication.
- Cryptographic signing
- Key rotation
- Selector management
Understanding MTA-STS
Enforce TLS encryption for email delivery and prevent downgrade attacks with MTA-STS.
- TLS enforcement
- Policy configuration
- TLSRPT reporting
Understanding BIMI
Display your brand logo in email clients with BIMI visual authentication standard.
- Logo requirements
- VMC certificates
- Implementation steps
π― Not Sure Where to Start?
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Frequently Asked Questions
What is DMARC and why do I need it?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol that protects your domain from unauthorized use. It prevents email spoofing, phishing attacks, and improves email deliverability. Learn more about DMARC fundamentals.
How do I set up a DMARC record?
Setting up DMARC involves creating a TXT record in your DNS with specific tags like policy (p=), aggregate reports (rua=), and alignment rules. Start with p=none for monitoring, then gradually move to quarantine or reject. See complete DNS specifications.
What's the difference between SPF, DKIM, and DMARC?
Why are my emails going to spam?
Emails can go to spam due to missing or misconfigured authentication records, poor sender reputation, or content issues. Start by checking your DMARC, SPF, and DKIM alignment. Use our free domain checker to diagnose issues.
What is MTA-STS and do I need it?
MTA-STS enforces TLS encryption for email delivery, preventing downgrade attacks and man-in-the-middle interception. It's recommended for organizations handling sensitive data. Learn about MTA-STS implementation.