Linux Mail Server Setup and Howto Guide

This page will show you how to join your Linux server into the Active Directory domain, how to integrate the Active Directory user accounts into the Linux user accounts and how to authenticate users in Active Directory using Winbind, a component of Samba.

Red Hat Enterprise Linux 4 and its derivative CentOS 4 includes a graphical tool called Security Level Configuration for configuring the firewall options. This guide describes how to use this tool to open up the ports necessary for providing an email server.

This article will guide you in configuring MailScanner, ClamAV and SpamAssassin to work in Postfix. Before proceeding, please make sure that all of the above components are already installed.

To install MailScanner, we are going to download the latest source code from the MailScanner web site and build it. For this to work, it needs the Development Tools package. If you did not include this during installation, you must add it now. Learn how to add or remove applications here.

To install Clam AntiVirus (ClamAV), we are going to use the precompiled binaries from Dag Wieers RPM packages for Red Hat, RHEL, CentOS and Fedora. To do this, we are going to configure Yum to look for the ClamAV packages in Dag’s repository.

In Linux, new user accounts automatically receive mail accounts. Here are the steps for adding new users in Red Hat Enterprise Linux 4 or CentOS 4.

SquirrelMail is an open source standards-based webmail package written in PHP. When installed, SquirrelMail is ready out of the box. All it needs is an installed web server like Apache, SMTP server like Postfix, and IMAP server like Dovecot.

Installing and setting up Dovecot in RHEL 4 or CentOS 4 is easy. All we have to do is to enable the services we would like to provide and we are good to go.

Installing and setting up Postfix SMTP Server in RHEL 4 or CentOS 4 is easy. Postfix has secure default settings so we just need to open it up a bit.

Red Hat Enterprise Linux 4 and its derivative CentOS 4 includes an extensive list of applications that can be easily added or removed. This guide will show you how to do it using the Package Management tool.