smtp relay problem

[evilkalah]

Hello,

i recently installed exchange 2000 server.
On the network there is the active directory installed with domain ecm.be
In the dns there is ecm.be and ecmdemo.be defined.
Now when I send a mail with a user to for example evilkalah@evilkalah.be its working fine. When i send a mail to demoexchange@ecmdemo.be its working fine also.

Now what i want is that when i send with a user of exchange to an ...@ecm.be mail address he uses the smtp server of my isp and not my smtp server. How do i accomplish this?
because ecm.be is a domain hosted by an external webhosting company. and ecmdemo.be is only for playing with my exchange.

 

[tangostar]

I think what you want to use is Smart Host.
Never used it, but you can set that up in your Routing Group in Exchange System Manager