Use a private email account that can only be read by you. If your computer is shared with others in the house, set up a free Web-based email account to send private email. There are many free Webmail services available. Gmail and Hotmail both have very good services with plenty of storage for your emails. Using a Web-based account also allows you to check your email from any computer that has an Internet connection (for example: the library or a friend's house).