iRedMail is a shell script that lets you quickly deploy a full-featured mail solution in less than 2 minutes on CentOS 5.x (it supports both i386 and x86_64). Its object is to make a Linux mail server installation and configuration simple and easy to use. iRedMail supports both OpenLDAP and MySQL as backends for storing virtual domains and users.This tutorial shows how to use the OpenLDAP as the backend.