I read an article in the Guardian today about bots and fire walls. It said \nthat if you have a router with a firewall you can block outgoing traffic on \nport 25 to see if anything keeps trying to go out (spams). I have a Bt \nVoyager router and no idea about anything that it has or has not capablity \nto do. However, I do have Zonealarm free edition and wondered if I can do \nthis blocking the port 25 business on that firewall. If I can do it, well, \nhow?