Free tool

Free SPF, DKIM & DMARC Checker

Check your domain's email authentication in seconds — completely free, no signup. See if your SPF, DKIM, and DMARC records are set up correctly, and get a deliverability score.

$4
per 1,000
3-layer
SMTP probe
0–100
score
Get fix recommendations free
  • 100% free — no signup to check
  • SPF + DKIM + DMARC in one scan
  • Plain-English status for each record
  • 0–100 authentication score
Free SPF · DKIM · DMARC checker

Check your email authentication

Free, no signup. Enter your sending domain.

01WHY EMAIL

Why email authentication matters

SPF, DKIM, and DMARC are the three records that prove your emails really come from you. Without them, mailbox providers distrust your mail and route it to spam — even if your list is clean.

  1. SPF (Sender Policy Framework)

    Lists which servers are allowed to send email for your domain. Without it, anyone can spoof you and ISPs notice.

  2. DKIM (DomainKeys Identified Mail)

    Adds a cryptographic signature to every email proving it wasn't tampered with in transit.

  3. DMARC

    Ties SPF and DKIM together and tells mailbox providers what to do with mail that fails (quarantine or reject). This is the one most domains skip.

02WHAT A

What a good setup looks like

RecordHealthy state
SPFPresent, ends in -all or ~all
DKIMPresent with a valid public key
DMARCPresent with p=quarantine or p=reject (not p=none)

A DMARC record with p=none exists but does nothing — it monitors without enforcing. Our checker flags this as "weak".

Frequently asked

Answers to the questions teams ask first

Is this SPF/DKIM/DMARC checker free?

Yes — free, no signup. Just enter your domain.

Why does my DKIM show as missing?

DKIM uses a "selector" that varies by provider. We probe the 20 most common selectors; some custom setups use a selector we don't test. Sign up for a deeper scan.

What is a good DMARC policy?

p=quarantine or p=reject actually enforce. p=none only monitors and offers no protection — upgrade it.

Does authentication affect deliverability?

Massively. Gmail and Yahoo now require SPF + DKIM + DMARC for bulk senders. Without them your mail goes to spam regardless of list quality.

No card. No subscription. Credits never expire.

Verify your first 100 emails free.

Sign up in under 30 seconds. Paste a list, hit verify, see the real SMTP-level result with a 0–100 deliverability score.

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