See http://www.slipstick.com/contacts/addauto.htm for various ways to save senders or recipients as new contacts automatically, depending on your version and configuration of Outlook.

Signature
Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> How do I automatically add contacts from emails in my
> inbox? I thought Outlook Express did this by default but
> Outlook doesn't.
>
> Thanks in advance.