Free DKIM checker
Validate public DKIM signals alongside DMARC and SPF in one scan.
Broken DKIM breaks alignment and weakens spoofing defenses. RedScore discovers common public DKIM selectors and checks validation signals on your domain. Start at /lookup with the domain you send mail from.
Scan your domainFree scan · No signup · Results in ~60 seconds · Opens /lookup
example-corp.com
✓ scan complete · grade D · 4 issues
AI summary
DMARC enforcement is missing, which leaves spoofing open. SPF is too permissive. Several key web security headers are absent.
Why DKIM checks matter
DKIM problems often show up as deliverability drops long before security teams notice. RedScore checks public DKIM signals so you can fix DNS before campaigns or customer mail suffer.
Built for senders
One outside-in scan covers DKIM, DMARC, SPF, and the rest of your public domain posture.
Public DKIM selector discovery signals on your domain.
DKIM key validation checks visible from the outside.
See DKIM issues in context with DMARC and SPF on the same report.
Email auth plus DNS, TLS, headers, and exposure in about 60 seconds.
What you get
RedScore returns email category grades, a 0-100 score, and fix-first guidance across your public footprint.
63 / 100
Grade C
example-corp.com
AI summary
Cookie settings are weak and server headers reveal stack details. Email spoofing is plausible with incomplete SPF and DMARC.
What RedScore checks today
This is not a mailbox seed test or ESP console audit. It checks public DKIM and DNS signals visible from the internet.
After the free scan
Free scans show summary grades. Claim the domain to unlock selector-level findings and monitoring.
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