Mail Server Setup Guide for RHEL/CentOS 4

This page will show you how to setup a mail server with antispam and antivirus capabilities and can be integrated into Active Directory.

How to install Linux

You can use either Red Hat Enterprise Linux 4 or CentOS 4. This guide will also work with CentOS 4.1, 4.2, 4.3, 4.4 and 4.5. RHEL 4 can be purchased from Red Hat and comes with support. CentOS 4 on the other hand can be downloaded here.

1. How to install CentOS 4.

2. How to setup CentOS 4.

Note To simplify our administration tasks, log in as the user root and specify your root password. This is not the recommended way of administering a Linux box, but for the tasks at hand it is the most efficient way.

How to install SMTP, POP3, IMAP and WebMail service

These are the standard mail services and the guides below will show you how to install them.

1. How to install and setup Postfix SMTP Server.

2. How to install and setup Dovecot POP3/IMAP Server.

3. How to install and setup SquirrelMail WebMail.

4. How to configure the firewall.

How to create mailboxes, aliases and distribution groups

To create a mailbox, just create a new user account.

How to setup a mailing list or proxy address in Postfix.

How to add antivirus and antispam filtering

These are great add-ons that will benefit your mail users.

1. How to install Clam AntiVirus (ClamAV).

2. How to install MailScanner.

3. MailScanner, ClamAV, SpamAssassin and Postfix integration guide.

Note You can greatly reduce the volume of spam and viruses reaching your mail server if you are willing to give up something. If you are willing to have your mail delayed (time), install Postgrey. If you are willing to spend (money), get the Barracuda Spam Firewall.