mail has iSight picture that won't go away

I send email and with it goes a picture taken with isight when I first set up the OS. The picture is not one I want nor do I even want one being sent as some go to customers. How do I get rid of this picture? It is at the top right of the email. Thanks in advance.

Go to:

System Preferences > Accounts > Picture tab

You can change it there.

Thank you , never thought of looking there.