Email Deliverability Debugger — Check SPF, DKIM, DMARC & Blacklists Free
Diagnose why your emails land in spam. Instantly check SPF, DKIM, DMARC, MX records, and blacklist status. Get a deliverability score and actionable fixes — free, no sign-up.
Frequently Asked Questions
What does the email deliverability debugger check?
The tool checks your domain's SPF, DKIM, and DMARC DNS records, blacklist status, and MX configuration — the key factors that determine whether your emails land in the inbox or spam folder.
Why are SPF, DKIM, and DMARC important for email deliverability?
SPF tells receiving servers which IPs are allowed to send email for your domain. DKIM adds a cryptographic signature to verify email authenticity. DMARC tells servers what to do if SPF or DKIM checks fail.
My emails are going to spam — can this tool fix that?
The tool diagnoses the most common deliverability issues. If an SPF or DMARC record is missing, adding one often resolves spam filtering. The tool provides specific instructions for each issue found.
How long does it take for DNS changes to take effect?
DNS propagation typically takes 15 minutes to 48 hours depending on your DNS provider's TTL settings. Check again after 24 hours if you've recently made changes.
