Assuming your version is 2002 (never fail to post your version), they are
stored in a file with an NK2 extension. You can only access it with third
party tools:
http://www.dcs-imaging.com/products.htm

Signature
Russ Valentine
[MVP-Outlook]
> When I type the first three letters of an email which I have previously
> sent
> the entire email automatically pops up. How can I access all of those
> emails
> I have ever typed so I can find some lost clients??