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You are interested in learning all the basics about running your own mail server using Debian Squeeze? Be my guest. All you need is a computer running Debian (Squeeze) and an internet connection. This tutorial explains step-by-step how to set up such a server and give you lots of background information in the process. Depending on the internet connection and server hardware you will be able to run a reliable mail service for thousands of domains and users. Soon you will be proud operator of a mail server that can:
receive and store email for your users from other mail servers on the internet
let your users retrieve the email through IMAP and POP3 - even using SSL-encrypted connections
receive and forward ("relay") email for your users using SMTP authentication
offer a webmail interface to read emails in a web browser
detect most spam emails and filter them out or tag them