Hey,

If I understand you, you want a copy of every email you send on your Blackberry to automatically send a copy to you (to another specified email address).  This is autoBCC.  That can be done by pressing Menu>Email Settings>

This gets you to your Blackberry Internet Service email accounts.  Select the email account you want to edit and press the trackball.  Click Edit.  Scroll down to AutoBCC and type the email address you want to sent email to automatically.  Select Save and exit.  There you go.

Doc