Before installing IIS and associated components, make sure that your Windows operating system is setup with the following:
TCP/IP : IIS requires Transmission Control Protocol/Internet Protocol (TCP/IP). TCP/IP provides the Internet connectivity necessary for retrieving data from the Internet and for hosting a site on the Internet.
NTFS : IIS require use of NTFS file system for SMTP service. NTFS allows users to limit access to files and directories on a Windows NT Server. The use of NTFS is key to maintaining a secure Internet server and is necessary component of SMTP service.
IP Address for Server : Simply installing components of the Windows NT Option Pack - including IIS does not require a static IP address. However, if you intend to use IIS to publish content to the Internet, you should have a static IP address or at least an address that very rarely changes.