== postfix + courier-imap + squirrelmail

cd courier-authlib-0.61.0
./configure

make 
make install
make install-configure
cd /usr/local/etc/authlib/
chmod 755 /etc/init.d/courier-authlib
cp /root/work/courier-authlib-0.61.0/courier-authlib.sysvinit /etc/init.d/courier-authlib
/etc/rc.d/init.d/courier-authlib start

su - admin
cd courier-imap-4.4.1
./configure --without-authmysql --without-authldap --without-authcram --without-authuserdb
make 
su -
make install
ake install-configure
/usr/lib/courier-imap/libexec/pop3d.rc start
/usr/lib/courier-imap/libexec/imapd.rc start

vi /etc/squirrelmail/config_local.php

vi /
<?php

/**
 * Local config overrides.
 *
 * You can override the config.php settings here.
 * Don't do it unless you know what you're doing.
 * Use standard PHP syntax, see config.php for examples.
 *
 * @copyright &copy; 2002-2006 The SquirrelMail Project Team
 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
 * @version $Id: config_local.php,v 1.2 2006/07/11 03:33:47 wtogami Exp $
 * @package squirrelmail
 * @subpackage config
 */

//$default_folder_prefix                = '';
?>