Outlook is not keeping these emails. You are.
Activities consumes no space whatsoever. It is a dynamic list created from
the emails and other Outlook items you have kept that are related to that
Contact.
Delete the items if you don't want Outlook to store them.

Signature
Russ Valentine
[MVP-Outlook]
> How do I overide outlook 2003 so that it does not archive or keep every
> email
[quoted text clipped - 3 lines]
> since I
> often send people movie clips etc.