What does email header analysis mean?
In addition to the visible information, every mail message contains numerous control fields for routing the message through the Internet. This information can be used to retrace the route of a message from its sender to its recipient. To remain anonymous, senders of spam manipulate these control fields. They may, for example, change the information about the originating mail server. Message header analysis investigates the control information for consistence and completeness. If one or more irregularities are detected, they receive a rating, based on which they can be filtered according to the applicable policies.
