Headers contain tracking information for an individual email, detailing the path a message took as it crossed mail servers. If you need to view the headers of an email you have sent or received, the following links will aid you:
Webmail by Google
Information on extracting email headers from your Webmail by Google mailbox is available on the Google Message Headers website by clicking the "Gmail" link.
Microsoft Outlook
Information on extracting email headers from Outlook 2003 or 2007 is available on the General Email Abuse page at http://ist.njit.edu/telecom/emailabuse.php
