Linux Mail Server Setup and Howto Guide

This page 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.

Here are the installation guides for the above components.

• How to install Postfix SMTP Server
• How to install Clam Anti-virus (ClamAV)
• How to install MailScanner

SpamAssassin is included in Red Hat Enterprise Linux 5 and CentOS 5 and it’s ready to go out of the box. Just add it using the Package Manager tool if you haven’t done so during installation.

Configuring MailScanner

1. Edit the file /etc/MailScanner/MailScanner.conf

Installing and setting up Postfix SMTP Server in Red Hat Enterprise Linux 5 or CentOS 5 is easy. Postfix has secure default settings so we just need to open it up a bit.

Install Postfix and Mail Transport Agent Switcher

1. If you did not add postfix and system-switch-mail-gnome during the CentOS installation, you can add it now using Package Manager tool.

Enabling SMTP authentication in Postfix ensures that only users with valid accounts can send email outside your network (relaying). This prevents spammers from using your SMTP server as a spam broadcast station. Here’s how to do it in Postfix.

Active Directory has a type of grouping called Distribution group used solely as an email distribution list. This page will show you how to use the distribution group as a mailing list for Postfix. But first, you need to upgrade Postfix to version 2.4 or higher. Download Postfix RPM Packages.

This page 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.

Here are the installation guides for the above components.

• How to install Postfix SMTP Server
• How to install Clam Anti-virus (ClamAV)
• How to install MailScanner

SpamAssassin is included in CentOS 4 and ready to go out of the box. Just add it using the Package Management tool if you haven’t done so during CentOS installation. SpamAssassin is located in the Mail Server package.

Configuring MailScanner

1. Edit the file /etc/MailScanner/MailScanner.conf

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.

Install Postfix and Mail Transport Agent Switcher

1. If you did not add postfix and system-switch-mail-gnome during the CentOS installation, you can add it now. Postfix is located in the package Mail Server while system-switch-mail-gnome is in X Windows System. Learn how to add or remove applications here.