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FreeMailCheck Tools ARC Header Analyzer " data-section="" data-keywords="arc" >
FREE EMAIL INFRASTRUCTURE TOOL

ARC Header Analyzer

Analyze ARC-Seal, ARC-Message-Signature and ARC-Authentication-Results evidence from raw email headers.

What this tool checks

Analyze ARC-Seal, ARC-Message-Signature and ARC-Authentication-Results evidence from raw email headers.

FreeMailCheck reports only evidence it can observe. Network-dependent or message-level evidence can remain unknown when it cannot be verified reliably.

How to use this tool

  1. Enter the requested domain, hostname, IP address or email-header data.
  2. Run the check and wait for FreeMailCheck to collect the available DNS, SMTP or message evidence.
  3. Review the result details and warnings before changing a production mail configuration.

Understanding the results

This tool reports evidence that can be observed at the time of the check. DNS propagation, remote SMTP policies, network restrictions and unavailable message-level evidence can affect results.

An unknown result is not automatically a failure. FreeMailCheck avoids treating unavailable evidence as proof of an email configuration problem.

Related FreeMailCheck tools

Email Header Analyzer → Authentication-Results Analyzer → Received Header Analyzer → Mail Hop Analyzer → Sending IP Finder →