Linux Mail Server Setup and Howto Guide

Ideally, passwords should be changed regularly. This article describes how to setup password expiration using the User Manager application in Red Hat Enterprise Linux 5 or CentOS 5.

This article contains useful links on how to administer a Red Hat Enterprise Linux 5 or CentOS 5 server.

Poppassd is a service that changes system passwords. This article describes how to setup poppassd in Red Hat Enterprise Linux 5 or CentOS 5.

RPMforge is a third party RPM repository for Red Hat Enterprise Linux or CentOS. Adding the RPMforge repository will give you access to an extensive library of precompiled binaries. This article describes how to add the RPMforge repository in Red Hat Enterprise Linux or CentOS 5.

An LDAP server like the 389 Directory Server and OpenLDAP can be used to centralize the users and authentication information. This articles describes how to use LDAP based authentication in Red Hat Enterprise Linux 5 or CentOS 5.

This article will show you how to configure Postfix and Dovecot to handle multiple domains stored in MySQL. Postfix Admin is used to manage the domains, mailboxes and aliases in MySQL. See How to Install Postfix Admin to setup the MySQL database that will be used by Postfix and Dovecot.

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases. This article will show you how to install Postfix Admin to simplify management of mailboxes, domains and aliases.

The version of Postfix that comes with Red Hat Enterprise Linux 5 or CentOS 5 does not support MySQL lookups. You can build your own custom Postfix RPM or get a prebuilt RPM from the CentOS Plus repository. You can use the CentOS repository in RHEL since CentOS is binary compatible with RHEL. This article describes how to install Postfix with MySQL lookup table support from the CentOS Plus repository.

This article describes how to achieve single sign on with Active Directory using Identity Management for Unix (available in Windows 2003 R2 and above) or Services for Unix 3.5.

389 Directory Server formerly the Fedora Directory Server is an enterprise-class open source LDAP server for Linux. This article will show you how to setup the 389 Directory Server.