Installing on an email gateway or relay/perimeter server

GFI MailEssentials can be installed:

This setup is commonly used to filter spam on a separate machine, commonly installed in the DMZ. In this environment a server (also known as a gateway/perimeter server) is set to relay emails to the mail server. GFI MailEssentials is installed on the gateway/perimeter server so that spam and email malware is filtered before reaching the mail server.

GFI MailEssentials uses the IISInternet Information Services SMTP service as its SMTP Server and therefore the IIS SMTP service must be configured to act as a mail relay server. To do this: