Which tool can be used for analyzing email headers to troubleshoot spam issues?

The correct choice is the G Suite Toolbox, which is specifically designed for tasks such as analyzing email headers. This tool provides various utilities that can help you gain insights into email delivery and any potential spam issues by allowing you to inspect the details encoded in the email headers.

When analyzing headers, you can look at the path the email took, the servers it passed through, and any flags related to authentication. Such insights are vital in determining why an email might be classified as spam or how to improve delivery rates.

The other options, while related to email and administration, do not inherently focus on the detailed analysis of email headers for spam troubleshooting. Google Vault is more of an e-discovery and information governance tool, used for archiving and searching emails rather than analyzing their headers for spam issues. Email log search is helpful for querying past email logs but isn’t specifically geared towards header analysis. The admin panel monitoring provides general administrative oversight but doesn’t offer the specialized capabilities that the G Suite Toolbox offers for examining email headers directly.