By using the G Suite Toolbox Messageheader, you can extract a wealth of information such as:
Received Headers: These show the path an email took from the sender to the recipient, helping identify delays or issues in the email's journey. Authentication Results: Details on whether the email passed DKIM, SPF, and DMARC checks. Spam Filtering: Information on whether the email was flagged by spam filters. IP Addresses: The IPs involved in the email's transmission, useful for identifying suspicious activity.