DMARC Policy Builder

Create a DMARC DNS record with policy level, reporting addresses, and alignment mode. Prevent email spoofing.

Computational Status

AI Diagnostic Specialist

Automatically analyze tool output and explain results in plain English

Configure Tool Params

Your Domain

DMARC Policy Level

Aggregate Report Email (rua)

Daily XML summary reports sent here

Forensic Report Email (ruf)

Per-failure detailed reports (optional)

Subdomain Policy

Rollout % (pct)

SPF Alignment

DKIM Alignment

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Educational Guide: Understanding DMARC Policy Builder

Step-by-Step Operation Guide

Paste/Enter Email Details

Paste raw email headers, specify domains, or configure SPF/DKIM/DMARC attributes for DMARC Policy Builder.

Analyze Deliverability

Trigger blacklist scans, query MX propagation maps, or compile configuration records.

Review Auth Results

Inspect SPF/DKIM signatures alignment, verify server status, and implement AI-suggested optimizations.

How to Interpret Diagnostic Results

Email deliverability diagnostics for DMARC Policy Builder measure server reputation and configuration safety. Standard alignments confirm authentication status.

Verify SPF, DKIM, and DMARC alignment status. Ensure host domains are not blacklisted in global spam databases to preserve sender reputation.

Troubleshooting & Industry Standards

For DNS records, verify propagation times (up to 48 hours). Resolve deliverability failures by auditing domain DNS zones and registrar settings.

Reference Standards & Protocols

RFC 7208 (SPF)RFC 6376 (DKIM)RFC 7489 (DMARC)RFC 5321 (SMTP)

Frequently Asked Questions

Learn more about how this tool works and standard configurations

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that uses SPF and DKIM to determine the authenticity of an email message.

There are three policies: none (monitor only), quarantine (move suspicious emails to spam/junk folder), and reject (block unauthorized emails completely).

DMARC generates XML reports sent by recipient mail servers back to you, showing who is sending email on behalf of your domain and whether they pass authentication checks.