Logo URL, VMC certificate, and DMARC compliance
Policy, alignment, SPF records, and DKIM selectors
Policy files and SMTP TLS encryption requirements
TLS reporting records and policy specifications
Instantly verify your domain's email authentication configuration. Check BIMI logo URLs and VMC certificates, analyze DMARC/SPF/DKIM policies, validate MTA-STS and TLS-RPT records. Get actionable recommendations to improve deliverability, security, and brand protection across Gmail, Yahoo, Fastmail, and other major providers.
Secure your email infrastructure with our comprehensive authentication suite. Validate BIMI, DMARC, SPF, DKIM, MTA-STS, and TLS-RPT configurations. Monitor VMC/CMC certificates across major Certificate Authorities. Ensure your emails are authenticated, protected from spoofing, and display verified brand logos in customer inboxes.
DMARC (Domain-based Message Authentication, Reporting, and Conformance) protects your domain from unauthorized use and email spoofing. Building on SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail), DMARC provides a comprehensive framework for email authentication, enabling domain owners to specify how email receivers should handle messages that fail authentication checks.
Implementing DMARC gives you visibility into all emails sent using your domain, detailed reports about authentication results, and control over how email providers handle failed authentication. This combination of monitoring and enforcement makes DMARC essential for modern email security and a prerequisite for implementing BIMI (Brand Indicators for Message Identification) with VMC certificates.
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Monitor mode - no action taken on failed emails
Ideal for initial implementation. Receive reports about email authentication without affecting delivery. Use this policy to identify legitimate email sources and fix authentication issues before enforcing stricter policies.
Failed emails sent to spam/junk folder
Recommended for most organizations. Failed emails are marked as suspicious and sent to spam. Required for BIMI logo display. Provides strong protection while minimizing the risk of blocking legitimate emails.
Failed emails completely blocked
Maximum protection. Failed emails are rejected and never reach the inbox. Provides the strongest protection against spoofing and phishing but requires careful implementation to avoid blocking legitimate emails. Enables BIMI logo display.
The critical relationship between email authentication and brand logo display
DMARC Policy Requirement
BIMI requires a DMARC policy of "quarantine" (p=quarantine) or "reject" (p=reject). A policy of "none" (p=none) is insufficient because it doesn't provide enforcement to prevent email spoofing. This ensures only authenticated, legitimate emails display your brand logo.
Authentication Alignment
For BIMI to work, emails must pass DMARC authentication, requiring SPF or DKIM (or both) to pass with proper alignment. The domain in the "From" header must match the domain authenticated by SPF or DKIM, ensuring the email genuinely comes from your organization.
VMC Certificate Verification
When DMARC authentication passes and a BIMI record is found, email providers check for a VMC certificate. The VMC provides cryptographic proof of trademark ownership, completing the chain of trust from domain authentication to logo display. Major providers like Gmail require VMC certificates.
Stop attackers from sending emails that appear to come from your domain, protecting your brand reputation and customer trust.
Significantly decrease successful phishing attempts by ensuring only authenticated emails from your domain reach customer inboxes.
Properly configured DMARC increases the likelihood that your legitimate emails reach the inbox instead of spam folders.
Email Deliverability Impact
Implementing DMARC with proper authentication enables BIMI and significantly improves email deliverability. Email providers trust authenticated emails more, resulting in better inbox placement, reduced spam filtering, and higher engagement.
Receive detailed reports about all emails sent using your domain, including unauthorized sending sources and authentication failures.
DMARC with quarantine or reject policy is required for BIMI, allowing your verified brand logo to appear in customer email clients.
Satisfy regulatory and industry standards for email security, including requirements from major email providers and security frameworks.
Real-time monitoring of Verified Mark Certificates (VMC) and Common Mark Certificates (CMC) across all major Certificate Authorities. Track certificate status, expiration dates, and renewal patterns to identify opportunities and maintain BIMI compliance.
Our database updates continuously to provide accurate VMC certificate intelligence for email security professionals and brand protection teams. Monitor over 11,000 certificates from DigiCert, Entrust, Sectigo, GlobalSign, and other major CAs to stay ahead of expirations and identify sales opportunities.
Total Certificates (2024+)
All VMC/CMC certificates from 2024 onwards
Active Certificates
Currently valid certificates
Expired Certificates
Certificates that have expired
Expiring in 2025
Certificates expiring this year
Monitor VMC and CMC certificates across all major Certificate Authorities with automatic updates. Track status changes, expirations, and renewals in real-time.
Never miss a certificate expiration. Get insights into upcoming expirations and renewal patterns to maintain uninterrupted BIMI logo display.
Comprehensive coverage of DigiCert, Entrust, Sectigo, GlobalSign, and other major Certificate Authorities. Track certificates from all providers in one place.
Access comprehensive historical certificate data. Analyze trends, identify patterns, and make data-driven decisions about certificate management.
Identify expired certificates that were not renewed - valuable sales opportunities for organizations offering VMC/CMC certificate services.
Monitor competitor certificates, track industry adoption rates, and ensure your organization stays ahead in email authentication and brand protection.
Mandatory Authentication Requirements
Major email providers now enforce strict authentication requirements. Gmail and Yahoo require DMARC, SPF, and DKIM for bulk senders, while Gmail mandates VMC certificates for BIMI logo display. MTA-STS adoption is growing rapidly as organizations prioritize email encryption.
Comprehensive Security Approach
Modern email security requires multiple layers: DMARC for authentication policy, SPF and DKIM for sender verification, BIMI with VMC for visual brand indicators, MTA-STS for enforced encryption, and TLS-RPT for security monitoring. Organizations implementing all protocols see the best deliverability and security outcomes.
Measurable Business Impact
Organizations with proper email authentication report 10-30% improvements in inbox placement rates, 5-15% increases in email engagement, significant reductions in phishing incidents, and enhanced brand trust. The ROI from improved deliverability and security typically exceeds implementation costs within the first year.
Evolving Standards & Tools
Email authentication standards continue to evolve with new protocols like MTA-STS and TLS-RPT gaining adoption. Certificate Authorities (DigiCert, Entrust, Sectigo, GlobalSign) are streamlining VMC issuance processes, while validation tools make it easier for organizations to implement and maintain proper authentication configurations.
