Dear All, To manage SMTP and POP3 servers, following your article "How to use ISA Server Packet Filters", I tried to create a new IP Packet filters Rule and then I restarted Firewall Service. With NETSTAT utility (typing "netstat -na|find ":25" and "netstat -na|find ":110"), I checked if ports 110 and 25 were opened, but I didn't find any ports opened. Terrible!!! What is the reason? Can someone help me? Thanks in advance. Mimmo