DMARC Builder

DMARC Generator

Generate an RFC 7489 compliant DMARC record with policy configuration and reporting tags.

1. Primary Policy Enforcement (p=) Core Requirement

Specifies what mailbox providers should do when receiving an email claiming to be from your domain that fails SPF and DKIM authentication.

2. Subdomain Policy (sp=) Subdomain Protection

Determines how all child subdomains (*.yourcompany.com) should be handled.

3. Telemetry & Diagnostic Reporting Gmail & Yahoo 2024 Mandate

Specify where mailbox providers send daily XML reports detailing who is sending email from your domain and authentication pass/fail stats.

Receives daily summary XML telemetry
Receives instant failure diagnostic samples
4. Staged Rollout Percentage (pct=)

Gradually apply policy enforcement to a fraction of unauthenticated mail to safely test without risking legitimate traffic.

100%
Policy applies to 100% of unauthenticated emails (full protection).
5. Identifier Alignment Modes

Choose between standard relaxed mode (subdomains match root domain) or strict mode (exact domain match required).

Generated Authoritative DMARC Record

v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc-reports@koravio.com;
Google & Yahoo 2024 Bulk Compliance Compliant
Includes valid DMARC1 protocol version, enforcement policy, and mandatory rua= reporting address.
How to publish in your DNS manager (Cloudflare, GoDaddy, Namecheap):
Type: TXT Host / Name: _dmarc (or _dmarc.koravio.com) TTL: 3600 (1 hour)

How It Works in 3 Simple Steps

01

Select Policy Level

Choose None (monitoring), Quarantine (spam folder), or Reject (block).

02

Configure RUA/RUF

Add destination email addresses for forensic and daily aggregate reports.

03

Generate & Publish

Copy the formatted record for the _dmarc subdomain.

Pro Tips for Maximum Performance
  • Start with p=none for 2-4 weeks to monitor legitimate sending traffic before advancing to p=quarantine.

Frequently Asked Questions

Publish as a TXT record with host _dmarc (or _dmarc.yourdomain.com).

Related Free Outbound Tools

Domain Health Checker

Score your sending domain in one click: MX, SPF, DKIM, DMARC, BIMI, and MTA-STS, with copy-paste DNS fixes for anything that fails.

MX Lookup

See which mail servers accept email for any domain, their priority and the provider behind them.

SPF Checker

Validate an SPF record, count its DNS lookups against the limit of 10 and catch the mistakes that break authentication.

Want Guaranteed Pipeline Without Running Tools Manually?

Koravio builds, verifies, and runs end-to-end autonomous outbound infrastructure that books 15–30 qualified B2B meetings per month on 100% pay-on-performance.

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