Free Domain Health Checker
Run a one-time check for domain resolution, MX, SPF, best-effort DKIM detection, and DMARC. The score describes published configuration, not inbox placement.
Up to 5 free checks per day. No signup required.
Domain Health Report
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Get 50 free verification creditsWhat We Analyze
The four pillars of email deliverability, checked in seconds.
MX Records
Verifies mail exchange servers exist and identifies the email provider (Gmail, Microsoft 365, etc.).
SPF Record
Checks for Sender Policy Framework, the record that authorizes which servers can send email for your domain.
DKIM Signing
Detects DKIM records that cryptographically sign outgoing emails to prevent tampering.
DMARC Policy
Verifies the DMARC policy that tells receivers what to do when SPF or DKIM authentication fails.
Frequently Asked Questions
What does the domain health checker analyze?
It checks four critical DNS records: MX records (mail servers), SPF (sender authorization), DKIM (email signing), and DMARC (authentication policy). Missing or misconfigured records can cause your emails to land in spam or be rejected entirely.
What does the domain health score mean?
The score is a weighted checklist from the tool's five checks. DKIM detection tries common selectors and can miss a valid custom selector. The score does not guarantee deliverability or inbox placement.
How do I fix missing SPF, DKIM, or DMARC records?
These records are added through your domain's DNS settings (usually your domain registrar or hosting provider). Check our help center for step-by-step guides on setting up each record.
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Sign up free and get 50 verification credits with full SMTP mailbox confirmation.