Simulate ISP

[Jean Brico]

Have a nice day.

I've one postfix on Debian Squeeze that works fine.

I'd like now to mount an other postif on an other Squeeze, that will simulate 
my ISP (I'm teacher).

Then, my first postix will become a relay and will send mails to my "ISP 
Postfix".

I'm not able to find informations about configuration of the "ISP machine". Is 
it possible to have some keywords to start my resarchs on the net ?

Thanks for all.

Best regards.