Email Header Analyzer

Read routing hops and claimed authentication results from email headers locally, without uploading the message.

How to use this tool

1. Use your mail client’s original-message or view-source option.
2. Paste only the header block; a blank line marks the start of the body.
3. Review routing entries and compare sender, Reply-To, and Return-Path without treating them as verified identities.

Try an example

Paste the message’s original headers, including Received and Authentication-Results when present.

Keep your findings reproducible

Save the original value, source URL, access time, and your interpretation in an evidence log. A tool output should support a documented method rather than replace source evaluation.

Read the related field guide →

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