we'll build a centralized logging server that collects all those logs and puts them into a database. In addition we'll install a small web application that supplies a sysadmin friendly userinterface to the database and that allows to deploy some basic filtering.
receive and store email for your users from other mail servers on the internetlet your users retrieve the email through IMAP and POP3 - even using SSL-encrypted connectionsreceive and forward ("relay") email for your users using SMTP authenticationoffer a webmail interface to read emails in a web browserdetect most spam emails and filter them out or tag them