Read reported SPF, DKIM and DMARC results from pasted email headers.
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When to use Email Header Analyzer
Diagnose a delivered message using its Authentication-Results and related header fields. The tool displays reported outcomes and a few useful sender and routing fields.
How to use this tool
- Copy the full original message headers
- Paste them without the email body
- Review reported authentication results and verify the trusted receiving server
Before you use the result
This tool does not verify DNS records or cryptographic signatures. Headers can be forged; trust only authentication results added by your receiving provider.
Open the downloaded file or export before relying on it. Keep the original so you can compare quality, recover data or try different settings. Use only material you have permission to process.
Questions about Email Header Analyzer
Does a reported pass guarantee inbox placement?
No. Authentication is one requirement. Sender reputation, consent, complaint rates and content can also affect delivery.
Where are my files or inputs processed?
Files, pasted text and CSV inputs for this tool are processed in your browser. The tool does not upload them to WebInMarketing. Clear the page when finished on a shared device.
What are the input limits?
File tools accept up to 25 MB per file and 60 MB per batch, with at most 20 files. PDF rendering is limited to 40 pages and 20 megapixels per page. Image output is limited to 20 megapixels. CSV tools accept up to 10 MB and 20,000 rows. Large jobs may need a desktop browser.