Skip to main content
Email Tools

Email Header Analyzer

Analyze raw email headers to trace delivery hops and check SPF/DKIM/DMARC authentication results.

Get 20% OFF on Hostinger Hosting Plans

Get 20% OFF on Hostinger Hosting Plans

Launch your website with reliable Hostinger hosting and get 20% OFF on any eligible hosting plan through our special offer. Choose the plan that fits your website and start building today.

Buy at 20% discount

This page contains affiliate links. We may earn a commission at no extra cost to you.

Paste raw email headers below to trace delivery hops and check SPF/DKIM/DMARC authentication results - entirely in your browser.

Analyzed entirely in your browser - headers are never sent anywhere.

Paste the complete raw headers - "Show original" in Gmail, or "View source" in Outlook and Apple Mail - not just the From and Subject lines. Each mail server that handles a message adds its own Received line at the top, so reading them from bottom to top traces the route from the sender to your inbox and shows where a delay happened. The analyzer also reads the Authentication-Results header to show whether SPF, DKIM and DMARC passed; a fail usually means the message came from a server the domain has not authorized, or was altered in transit. JustChecker builds tools that respect your data - this one never leaves your browser.

Frequently Asked Questions

No - this tool parses headers entirely in your browser using JavaScript. Nothing you paste is transmitted anywhere.

Most email clients have a "Show original" or "View source" option (usually in a message's menu) that reveals the full raw headers, not just the visible From/To/Subject fields.

Each "Received" header represents one server the email passed through on its way to you - reading them from bottom to top shows the actual delivery path.
Share this tool:

Tool Categories

SSL Tools DNS Tools Domain Tools Website Tools Security Tools Email Tools Performance Tools SEO Tools

Related Tools

SPF Checker DKIM Checker DMARC Checker MX Record Checker SMTP Connectivity Checker Mail Server Lookup DMARC Record Generator Email Security Summary