This article describes how to install the Dovecot mail server from source as an imap / pop3 mail server, and how to set up the sieve plugin so that the customers can use the sieve mail filtering language for their mail accounts.

Smbind is a PHP-based software tool for managing DNS zones for BIND via the web interface. This supports the per-user administration of zones, error checking, and a PEAR DB database backend.

This article describes how to set up database replication in MySQL. MySQL replication allows you to have an exact copy of a database from a master server on another server (say we can call it as slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup method or policy because an accidentally issued DELETE or ALTER command will also be carried out on the slave; but replication can help protect against hardware failures though.