Email Authentication Monitoring
Protect your domain's email reputation with automated DKIM, SPF & DMARC checks.
Start Free TrialComplete Email Security Visibility
Monitor the DNS records that protect your domain from spoofing and phishing attacks.
DKIM Validation
Verify your DKIM selector records are properly configured and cryptographically valid.
SPF Analysis
Monitor your SPF record for proper syntax, DNS lookup limits, and authorized senders.
DMARC Policy
Ensure your DMARC policy is correctly published and receiving aggregate reports.
Automated email authentication monitoring
We continuously validate your email security DNS records and alert you when something changes or breaks.
What we check
- SPF Record: Syntax validation, DNS lookup count (max 10), and authorized IP/includes
- DKIM Selectors: Public key presence, key length, and record format
- DMARC Policy: Record existence, policy mode (none/quarantine/reject), and reporting config
- MX Records: Mail server availability and priority configuration
When we alert you
- SPF record has too many DNS lookups (exceeds limit of 10)
- DKIM selector is missing or has an invalid public key
- DMARC record is missing or misconfigured
- Any DNS record changes that could affect email deliverability
- Each alert includes specific issues found and remediation guidance
Email authentication checks run automatically every 6 hours for all plans, including the Free tier.
Why Email Authentication Matters
Misconfigured email authentication records can cause your legitimate emails to land in spam—or worse, allow attackers to spoof your domain.
- Deliverability: Gmail, Microsoft 365, and other providers require proper SPF/DKIM/DMARC for inbox placement.
- Brand Protection: DMARC prevents phishing attacks that impersonate your domain.
- Compliance: Many industries require email authentication for regulatory compliance.
- Visibility: Know immediately when a DNS change breaks your email flow.
Check Your Email Authentication Now
Use our free Email Auth Checker to instantly analyze your domain's SPF, DKIM, and DMARC configuration—no sign-up required.
Free Email Auth Check Start Monitoring