Microsofts Internet Information Services (IIS) is a web server software for providing World Wide Web (WWW) publishing, File Transfer Protocol (FTP) services, Simple Mail Transport Protocol (SMPT) services, and/or Network News Transfer Protocol (NNTP) services. inetinfo.exe runs the main IIS process, hosts most of the protocol engines of IIS (FTP, SMTP, NNTP, IMAP4, and POP3), and the admin service. (as of 6.0 WWW service run as its own process -Iisw3adm.dll / svchosts.exe)