FREE TOOL
Analyze email headers for authentication and routing information. Detect security issues, trace email paths, and verify sender authenticity.
In Gmail: Open email → Three dots menu → Show original → Copy headers
Get a comprehensive deliverability score for your domain.
Comprehensive domain analysis for all email records.
Validate your SPF records and ensure proper email authentication.
Verify DKIM signatures and public key configuration.
Test your emails against spam filters and improve deliverability.
Calculate optimal mailbox counts for your email infrastructure.
Email headers contain crucial information about an email's journey from sender to recipient, including authentication results, routing paths, and security indicators that help identify legitimate emails and detect potential threats.
Authentication results
SPF, DKIM, and DMARC verification status from receiving servers.
Routing information
Complete path showing each server the email passed through.
Security indicators
TLS encryption status and potential security warnings.
Detect spoofing
Identify authentication failures that indicate potential email spoofing.
Troubleshoot delivery
Find delays or issues in email routing and delivery paths.
Verify authenticity
Confirm legitimate senders through proper authentication.
InboxKit provides everything you need for guaranteed deliverability and security monitoring
