How can headers be analyzed for placement patterns?
Header analysis reveals placement factors:
Authentication results: SPF, DKIM, DMARC pass/fail status. Authentication-Results header shows outcomes.
Spam scores: Some filters add headers showing spam probability or scoring.
Routing path: Received headers show which servers handled the message.
Provider-specific headers: Some providers add diagnostic headers explaining handling decisions.
Comparing headers from inbox-placed versus spam-placed messages can reveal what differed.
The cargo manifest and inspection stamps tell the story of how your shipment was evaluated.
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