Email authentication monitoring that protects your sending reputation

Built for teams that rely on email delivery, trust, and domain security.

Continuously verify your DKIM, SPF, and DMARC records so misconfigurations, broken selectors, and risky DNS changes do not quietly damage deliverability.

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Email Authentication

Catch broken DKIM, SPF, and DMARC before they wreck deliverability

Monitor the DNS records that protect your domain from spoofing, phishing, and inbox placement failures.

  • DKIM Validation Verify DKIM selector records are present, cryptographically valid, and match your sending domains.
  • SPF Analysis Monitor SPF syntax errors, DNS lookup count (max 10), and authorized sender coverage continuously.
  • DMARC Policy Ensure your DMARC policy is published, the enforcement mode is correct, and reporting is configured.
Email authentication monitoring alert
How it works

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.

Email authentication monitoring alert example
Why it matters

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.

Protect your email reputation today

Monitor DKIM, SPF, and DMARC continuously — or use our free one-time checker to audit any domain now.

Start Free Trial Free Email Auth Check
Checks every 6 hours All plans including Free Covers DKIM, SPF & DMARC