Email header explainer
Paste an original header to read its recorded SPF, DKIM and DMARC results. Nothing is uploaded.
The header explainer
Nothing uploadedHeaders can contain forged or multiple result blocks. Select the block added by the receiving system you trust. This tool cannot establish that trust or verify a signature.
No DNS lookups, signature verification or inbox-placement test is performed. We don’t store your header in cookies or browser storage. Reload or clear the page to remove it. Privacy details.
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