>I try use Ms. Proxy server for managing Internet access but I can not find POP3 and SMTP service on the Ms. internet service manager dialog, how to add these services? any body can help me please.. Thanks a lot

You didn't give much info about your installation. Are you using IIS 3.0? Did you install Proxy 2.0? Do you have the Winsock proxy running? Did you install the Proxyclient on the workstations? And the most important thing: Did you set the users permissions for the protocols in the Winsock Proxy?