F-Secure Internet Gatekeeper for Linux/Administrator’s Guide
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As outbound access is denied by restricting recipient domains, allow access from clients within the
LAN. The following example enables IP addresses specified in
192.168.1.xxx
and
192.168.2.xxx.
Proxy settings
SMTP proxy
LAN access settings:
On
Hosts and networks within LAN:
192.168.1.0/255.255.255.0 192.168.2.0/255.255.255.0
The following example uses POP-before-SMTP to enable data to be sent outside:
Proxy settings
SMTP proxy:
On
Global settings
POP-before-SMTP authentication:
On
POP proxy:
On
If the mail server performs SMTP authentication, you do not have to change any settings.