I have written a detailed description about the steps to be taken to setup a Debian based server (Debian Sarge alias Debian 3.1) that offers all services needed by ISPs and hosters (web server (SSL-capable), mail server (with SMTP-AUTH and TLS!), DNS server, FTP server, MySQL server, POP3/POP3s/IMAP/IMAPs, Quota, Firewall, etc.).
