Free Email Security and Deliverability Tools
A growing library of free checkers from DMARCeye. Run fast checks for DNS, SPF, DKIM, and BIMI to confirm your domain is configured correctly. No login required.
DNS Checker
Identify your DNS provider, review key DNS records, and spot email security gaps, including DMARC policy issues that can expose you to spoofing.
SPF Checker
SPF specifies which mail servers are allowed to send email for your domain. Use this checker to validate your SPF record and identify errors that may be reducing your deliverability.
DKIM Checker
DKIM signs your outgoing email so recipients can verify it hasn’t been altered. Use this checker to confirm your DKIM DNS record is published correctly.
BIMI Checker
BIMI can display your brand logo in supported inboxes. Use this checker to confirm your BIMI DNS record is published correctly and matches your domain setup.