Message Hi Friese, Yes, I have already created two protocol rules like you described, but I still can not send or receive emails via Outlook Express, I have just formated my server and installed Windows 2000 server and ISA Server again, but nothing changed, the symptoms and error messages are the following : 1- When I click on send&receive of Outlook Express, I receive the messages : a.. The host "smtp.uol.com.br"could not be found. Please verify that you have entered the server name correctly. Account: "pop3.uol.com.br", Server: "smtp.uol.com.br", Protocol: SMTP, Port 25, Secure (SSL):No, Socket Error: 11001, Error Number: 0x800CCC0D. b.. The host "pop3.uol.com.br"could not be found. Please verify that you have entered the server name correctly. Account: "pop3.uol.com.br", Server: "pop3.uol.com.br", Protocol: POP3, Port 110, Secure (SSL):No, Socket Error: 11001, Error Number: 0x800CCC0D. While the Outlook Express are trying to connect to server mail, I look at ISA Management and verify that don't have any session opened, it is correct ? 2- The settings for the Firewall Client and Web Browser from ISA Management are : a.. Firewall Client Properties : During setup, cofigure firewall client to connect to the ISA Server computer by : DNS Name The box "Enable ISA Firewall automatic discovery in firewall client" is checked. On Aplication settings I found an aplication Outlook with the key disable and value = 0 a.. Web Browser : The box "Configure Web Browser during Firewall client setup" is checked; The field DNS name is filled with the name of my ISA Server machine; Port 8080; On Automatic configuration all box is checked and the option "Use default URL" is selected I don't know what I can do, can you help me ? Thanks, Alex