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_ddmarcgenerator

Create DMARC recordPolicy, reporting and alignment with a live preview
SPF record generatorPick your senders, stay under 10 lookups

DMARC checkerPolicy, reporting and what to fix first
SPF checkerLookup count, providers and syntax
DKIM checkerFind keys without knowing the selector
Bulk DMARC & SPF lookupUp to 50 domains at once, CSV export

Report analyzer

What is DMARC?Policies, alignment and reporting
What is SPF?Authorizing the servers that send for you
What is DKIM?Signing mail and publishing keys
DMARC tag referenceEvery tag, with example records
From p=none to p=rejectA staged enforcement rollout
Bulk sender requirementsGmail, Yahoo and Outlook rules
DMARC for Google WorkspaceSPF, DKIM and DMARC setup
DMARC for Microsoft 365SPF, DKIM and DMARC setup
What is BIMI?Your logo in the inbox
What is MTA-STS?Enforcing TLS for inbound mail

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Questions about setting up DMARC, a bug to report, or a tool you'd like to see? Use either option below.

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For bug reports, feature requests, or general inquiries.

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Helpful Resources

What is DMARC? covers the fundamentals of email authentication.
DMARC Checker validates your domain's DMARC configuration.
Create DMARC Record builds a custom DMARC record with a live preview.

_ddmarcgenerator

Free DMARC, SPF and DKIM tools for the people who run email.

Tools

Create DMARC record
DMARC checker
SPF generator
SPF checker
DKIM checker
Bulk lookup
Report analyzer

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What is DMARC?
What is SPF?
What is DKIM?
What is BIMI?
What is MTA-STS?
DMARC tag reference
DMARC policy rollout

Guides

Bulk sender requirements
Google Workspace setup
Microsoft 365 setup

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