The Email Path Visualization Project
EPVP for Thunderbird is an addon which determines the route an email had taken during its transmission from one person to another.
Furthermore, it generates a list of countries the email traveled across and use colour codes them to indicate whether or not it is likely that the email was intercepted or monitored.
It is a useful tool for raising awareness of privacy issues related to electronic communications and the extension also allows the sender to send back the visualized routing information to the sender.
