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DIAGNOSTICS / SKY FREE TOOLS

Email Header Analyzer

Read redacted message headers to map hops and reported authentication results.

01 / INPUT

Find the last confirmed hop.

STEP 01
Header text only—do not paste the message body. Maximum 128 KB.0 / 131,072

Analysis runs locally in this browser. No report or message is uploaded.

Your entries stay in this tab. Not sent to or saved by Sky. Export or print before closing or reloading, or your entries will be lost. Do not include passwords, API keys, recipient lists or private logs.

NEXT / INTERPRET THE EVIDENCE

Use this result with the sending path, receiver response and authorized provider signals—not as a stand-alone placement verdict.

Explore the Signal Lab