Forward Email to Individual Accounts

Hi:

I have an STMP and POP3 Service running on a Windows 2003 server. I have

setup a few accounts under one of the domains hosted on the server. What I

would like to do is setup a forwarding script/program/task that would forward

mail addressed to a certain account to another individual email address that

is not hosted on the server, such as:

Mail to joe@smith.com is sent to jane@yahoo.com

In this example smith.com is hosted on my server.

I do NOT want to setup a generic forward for the whole domain to another

SMTP server. Thanks.