How to perform end-to-end header analysis for reputation clues?

Key headers to examine:

• Authentication-Results: SPF, DKIM, DMARC status
• Received: routing path and timestamps
• X-Spam-Status: spam scores and rules triggered
• X-MS-Exchange-*: Microsoft-specific decisions

What to look for:

• Authentication pass/fail
• Which server added spam markers
• Delay points in routing
• Filter rule triggers

Analysis process:

• Read headers bottom-to-top (oldest first)
• Track message journey
• Identify where problems occurred
• Note any scoring or classification

Tools:

• MXToolbox Header Analyzer
• Google Admin Toolbox
• Manual review

Cargo manifest stamps show every inspection point and decision made along the route.