Inspect what the receiving system recorded.
Review SPF, DKIM, DMARC, ARC and Authentication-Results evidence present in the headers rather than guessing whether authentication succeeded.
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Email Header Analyzer
Inspect authentication, routing and message identity evidence from raw email headers without uploading the message to InboxAI.
RAW MESSAGE HEADERS
Browser-localPaste your email headers
Copy the complete raw headers from your email provider and paste them below. InboxAI will inspect the evidence locally in this browser.
Private by design. Analysis runs locally in your browser. Your pasted headers are not uploaded by this tool.
Ready when you are.
Paste the raw message headers above and choose Analyze headers to inspect SPF, DKIM, DMARC, ARC, message identity and the recorded Received chain.
SPFDKIMDMARCARC
Follow the Received chain.
Inspect the message's recorded transport path, Return-Path, Message-ID and related header fields when they are present.
Your pasted headers stay in the browser.
This first version parses the material locally. InboxAI does not need to upload your raw headers to a cloud diagnostic service merely to display this evidence.
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Headers provide evidence, not a universal spam verdict
A message header can reveal authentication and transport evidence, but it cannot by itself prove why a mailbox provider placed a message in Inbox, Promotions, Spam or another category.
FROM MESSAGE TO INFRASTRUCTURE
Combine content review with real authentication evidence.
Use the local content tools for message preparation and InboxAI Domain Health for current DNS authentication diagnostics.