ForeFornt TMG not listening on port 25

Hi,

I've just installed a new ForeFront TMG. One thing i would like to do is to publish my email server.

If i do it creating a firewall rule, it works great, and the port 25 is shown as listening, but if, instead of creating the rule,, i create an email policy, the port 25 does not seem to be listening. Any idea? Am I doing something wrong?

Regards