Security

From: Tom (taegutom@hotmail.com)
Date: 12/12/02 

From: "Tom" <taegutom@hotmail.com>
Date: Thu, 12 Dec 2002 02:35:57 -0800

How can I prevent anyone from using my computer to access
my mail that has already been downloaded into my received
mail? I know about not remembering my password but what
about the ability to read what is already there. How can
I prevent this?