send mail to an ISP

I have a Freebsd box that I am using as a test server.
I want to run some scripts that send a summary to my email address (located at ISP)

What do I need to configure to do this? I do not want to receive mail on the server other than the system messages.

I tried to send some mail to myself by using

Code:

mail -s "Testmail" myemail@domain.com message goes here

I have pressed ctrl-d but nothing appears on the other end. I had a feeling this used to work but I am probably wrong.

any ideas?

cheers