What is a DMARC record?

A DMARC record is a DNS TXT record published at _dmarc.yourdomain that tells receiving servers what to do with mail that fails SPF or DKIM alignment — deliver it (p=none), quarantine it, or reject it — and where to send reports about it.

Which DMARC policy should I use?

Start with p=none plus a rua report address to monitor without affecting delivery. Once the reports show all legitimate mail passing, move to p=quarantine and finally p=reject, which gives full spoofing protection.

Is DMARC required to send email to Gmail or Yahoo?

Bulk senders (roughly 5,000+ messages a day) must publish a DMARC record — at minimum p=none — to deliver to Gmail and Yahoo under their sender requirements introduced in 2024. SPF or DKIM alone is no longer enough.

Is the domain I check stored anywhere?

No. The domains you check are never stored on our servers.

Check DMARC records online, quickly and free.

Guide

This free DMARC checker looks up the _dmarc TXT record for a domain, explains every tag in plain language, and flags policy problems like p=none left on forever or a missing report address.

How to check a DMARC record

Enter a domain (e.g. example.com — pasting a full URL or an email address also works).
Click "Check DMARC". The tool queries _dmarc.example.com for TXT records and finds the one starting with v=DMARC1.
Read the verdict: the raw record, a table explaining each tag, and a list of errors and warnings.

What the checker validates

Check	Why it matters
Record exists and there is exactly one	No record means receivers apply no policy; multiple records make them ignore DMARC entirely
`p` policy is present and valid	`p` is required; an invalid value invalidates the record
`p=none` warning	Monitoring mode delivers spoofed mail — fine to start, wrong to stay on
`sp` weaker than `p`	`sp=none` under `p=reject` leaves subdomains open to spoofing
`pct` below 100	The policy only applies to part of the failing mail
`rua` report address	Without aggregate reports you cannot see who sends as your domain
Tag syntax	Alignment values, mailto: URIs, and unknown tags are checked

Choosing a policy

Policy	Failing mail is	Use when
`p=none`	Delivered normally	Starting out — collect reports first
`p=quarantine`	Sent to spam	Reports show legitimate mail passes
`p=reject`	Rejected outright	Final goal — full spoofing protection

Example

Checking example.com might return v=DMARC1; p=none; rua=mailto:[email protected]. The tool confirms the record is valid, then warns that p=none only monitors and suggests moving to quarantine/reject once the aggregate reports look clean.

Check SPF and DKIM too

DMARC decides what happens when SPF and DKIM fail, so it is only as strong as those two. Verify them with the SPF checker and DKIM checker.

Limitations

The tool checks the published DNS record, not live mail flow or report contents.
Whether receivers honor pct or forensic (ruf) reports varies by provider.

Operated by

Tools by Timothe AI is a suite of free tools built and operated by unbounded pioneering inc, the company behind Timothe AI.

Ryosuke SuzukiFounder & CEO

Founder & CEO of Unbounded Pioneering Inc., the company behind Timothe AI, and an expert in machine learning and AI product development. He began his career in machine learning research at a university laboratory, then designed and built large-scale products as a software engineer at PLAID, Rakuten, and Recruit, while also driving new business development. Now specializing in generative AI and AI products, he works across both engineering and business development, and is a named inventor on multiple granted patents in web technology.

Named inventor on granted patents JP6887648 & JP7480958 · Patent pending on Timothe AI technology

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DMARC checker

Guide

How to check a DMARC record

What the checker validates

Choosing a policy

Example

Check SPF and DKIM too

Limitations

FAQ

Operated by

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