microsoft.public.exchange.setup

I recently installed Exchange on a new 64 bit server 2003 R2.

When my test user tries to send email to the outside, it doesnt go out.

In the unreachable domain queue, I see the following error to the affected
messages.

A matching connector cannot be found to route the external recipient

I've added a send connector. Im not sure is I have done this right. Any
guidance? Im a total newb.