Internet Connection Firewall (ICF)

In order to run a mail server, the Internet Connection Firewall (ICF) must either be completely disabled, or it must be enabled to allow access to ports 25 (SMTP), 80 (HTTP), 110 (POP3), and 143 (IMAP4).

Disable ICF:

1.Access the 'Network Connections' entry in the Control Panel:

2. In the 'Network Connections' sheet, choose 'LAN':

3. On the Local Area Connection Status page, press 'Properties':

4. On the 'Properties' sheet, choose the 'Advanced' tab:

5. On the 'Advanced' tab, disable ICF by unchecking the 'Internet Connection Firewall' box like this:

Then, click 'OK'.

Enable ICF:

1.Access the 'Network Connections' entry in the Control Panel:

2. In the 'Network Connections' sheet, choose 'LAN':

3. On the Local Area Connection Status page, press 'Properties':

4. On the 'Properties' sheet, choose the 'Advanced' tab:

5. On the 'Advanced' tab, enable ICF by checking the 'Internet Connection Firewall box':

and then click 'Settings' to configure the ICF ports.

6. On the 'Settings' page, select the 'Internet Mail Access Protocol Version 4 (IMAP4) box and click 'OK':

7.On the 'Service Settings' page for this server, enter the Name or IP address of the computer that will run the mail server (roll the mouse over the mailbox icon in the system try (lower-right of screen) to view the IP address. Then, click 'OK'.

Repeat the above for the servers:

Then, click 'OK'.