How can I block web based email from being accessed from inside our network(I.E. Hotmail accounts). We spend a lot of money on firewalls, virus protection on email servers/file servers/desktops and even content filtering of email for porn and the like. In waltzes joe user on his hot mail account and pulls in porn or viruses that cause us to use support time in reacting to it. Blocking the individual domains on the firewall is too reactionary and maintenance intensive. Is there software out there that can block this or a firewall configuration that works well?
