How do I delete contacts not in my contact list from my blackberry?

I have a Blackberry Curve 8530 and want to know how to delete contacts that are not in my contact list. Every time I write an email a whole bunch of contacts come up that I do not even have stored in my phone and I want to delete them. Does anyone know how to do it?|||To remove this feature where you see contacts that are not in your contact list while adding contacts to send an e-mail, navigate to "Messages", click the menu button (Blackberry symbol), "Options", "General Options", and lastly to disable this feature scroll down to "Show Recent Contacts When Composing Email:" and turn off the feature.