About

Why this directory exists

The directory lists DMARC providers and tools with short descriptions and links to official sources. Guides cover setup, authentication, and troubleshooting.

It is designed for domain administrators, IT teams, service providers, and anyone learning how DMARC works.

How listings are selected

Vendors must offer a relevant email authentication service with publicly available product information. Tools must have a clear practical use, an identifiable provider or open-source project, and a working destination.

• Feature labels describe information documented by the provider.
• A free plan and a free trial are labelled separately; personal-use restrictions are included.
• Profiles are informational summaries, not hands-on reviews or endorsements.
• Missing information is not treated as evidence that a capability is unavailable.

Our editorial approach

Guides focus on practical explanations and link to standards or provider documentation. News briefs distinguish the date of an event from the date we publish a summary. Review dates indicate when sources were checked, not a guarantee that every detail is unchanged.

The directory is not exhaustive. Products, eligibility, and pricing change, so always confirm the details that matter directly with the provider. This site does not accept payment for listing placement. Outbound directory links do not contain affiliate tracking.

Suggest an addition or correction

Include the page or provider name, the proposed addition or correction, and an official source.

Please do not send passwords, private keys, or unredacted email reports.