Email Header Analyzer
Analyze message headers: Received relays, SPF, DKIM, DMARC, Message-ID, Return-Path, IP addresses and delays.
Result
Collez les en-têtes du message.
L’analyse se fait localement. Les headers peuvent contenir des adresses email et IP : ne les partagez pas inutilement.
Use the result with confidence
Recommended workflow
- Use a non-sensitive representative input for email header analysis.
- Run the operation and review the result before copying or exporting it.
- Validate the output in the target application or environment before relying on it.
What to verify
- Confirm the scope, units and input values before interpreting the output.
- Separate the observed result from the operational decision that follows from it.
- Validate the conclusion against the real target system, logs or configuration before changing production.
Questions about this tool
Which headers are most useful when tracing a message?
Start with Received, Authentication-Results, Return-Path, Message-ID and the SPF/DKIM/DMARC results to rebuild the route and authentication state.
Can an email header prove that a message is legitimate?
No. Headers provide technical evidence, but forwarded mail, relays and spoofing attempts must be interpreted together with the sender domain and message context.
Should I remove personal data before analysis?
Prefer a redacted copy when possible. Addresses, hostnames and Message-IDs may identify people or infrastructure.