The SpamLion Sender Validation Gateway is a software application that runs on a computer in your network to protect you from the intrusion of Unsolicited Commercial Email. The computer, running Windows 2000 Server or Windows Server 2003, is in your company network between your mail server and the Internet. The SpamLion Sender Validation Gateway is ideal for businesses that have dedicated Internet access, and have their own mail server. Although similar to installing a firewall, it is less of a challenge. As with any server product, it is best installed by a network engineer with Microsoft operating systems and Internet expertise (Windows 2000 / 2003 Server installation, and setup of DNS, IIS, and SMTP). Once you have a properly configured Windows server, a planned installation and setup of SpamLion can be completed in 30 minutes or less.