Trivial Proxy is a small application that allow to see and log 
network activity of the any applications(browsers, email clients etc.).

So what does that mean in English? Simple, run TrivialProxy 
and configure it to redirect the local port to the specified 
host:port; configure the appication to use this port and 
localhost (it's very easy, there's), and voila! You're seeing 
and logging the network activity of this application! 
Supports HTTP (web), HTTPS (secure web), POP3 (recieve mail), 
SMTP (send mail), NNTP (newsgroups)! It works great with 
Internet Explorer, Firefox, Outlook, and many more!</p>

