Domain Security Checker
TrustYourInbox's comprehensive security analysis for your domain. Instantly check DMARC, SPF, DKIM, MTA-STS, and more—get actionable, expert recommendations.
Domain Security Checker
Frequently Asked Questions
Common questions about domain security
What is domain security?
Domain security protects your domain from email threats using SPF, DKIM, and DMARC protocols to verify sender identity and prevent unauthorized domain use.
What are SPF, DKIM, and DMARC?
SPF lists authorized email servers, DKIM adds cryptographic signatures, and DMARC tells receivers how to handle authentication failures. Together they provide comprehensive email security.
Why is email authentication important?
Email authentication prevents phishing, protects brand reputation, improves deliverability, meets 2025 compliance mandates, and provides visibility into email sending.
Help & Resources
Why Domain Security?
TrustYourInbox helps you protect your brand and users from phishing and spoofing. Secure your domain with industry-leading best practices.
- DMARC, SPF, DKIM authentication
- MTA-STS & TLS-RPT for secure delivery
- DNSSEC & FCrDNS for DNS integrity
Resources
Need more help? Check out our documentation or contact support.