Install Horde 4 Webmail For ISPConfig On Debian Squeeze Through PEAR

Introduction

Horde is a groupware suite that offers email, calendar, task, contact management and more things. It also offers SyncML and ActiveSync to synchronize with your cell phones or other software. You can find out more about Horde on their webpage: http://www.horde.org/

1. Install necessary packages

2. Register the Horde Pear channel

3. Set the Horde installation directory

You'll be asked the following question:
Filesystem installation for base Horde application: /var/www/horde
You can also chose another folder for the web-accessible horde files. However you'll need to adjust the path in the following steps then.

4. Install Horde Groupware Webmail Edition

There will be some errors regarding missing pear packages. Those will be fullfilled later.

5. Create MySQL Database

The Horde installation script will not create a MySQL database on its own. So we have to create it first and also the according user.
Enter the MySQL shell as
Once entered, create database and the user 'horde' with passwod 'PASSWORD'. If you want to alter the database name, username, change according information. Set your own password of course.
Exit the MySQL Shell again

6. Run installation script

You'll be asked the following questions:
What database backend should we use? mysql
Request persistent connections? 0
Username to connect to the database as: The username you set in the previous step
Password to connect with: The password you set in the previous step
How should we connect to the database? unix
Location of UNIX socket: Just press [enter]
Database name to use: The database name you set in the previous step
Internally used charset: utf-8
Use SSL to connect to the server: 0 *
Certification Authority to use for SSL connection: Just press [enter]
Split reads to a different server? false
Filesystem installation for base Horde application: /var/www/horde
Specify an existing mail user who you want to give administrator permissions (optional): user@domaincom **
* Only set SSL to 1 if you can provide for each domain a SSL cert.
** Select an existing email user. That user then has configuration rights from within Horde itself. This is needed to create initial configuration files.

7. Create custom phptmp folder and chown horde folder to Apache user

8. Add additional PEAR components

9.Add local PEAR holiday calendars (optional)

There are several holiday calendars already in PEAR available. By default they are not installed. Select one or more of the following calendars if you want to install them. This enables in Horde Kronolith (=calendar) to show holidays for that country. Of course you could also add your own custom calendar to the PEAR installation.

10. Create /etc/apache2/conf.d/horde.conf with the following content

Alias /Microsoft-Server-ActiveSync /var/www/horde/rpc.php
Alias /horde /var/www/horde

           Options +FollowSymLinks
           AllowOverride None
           order allow,deny
           allow from all
           php_value include_path ".:/usr/share/php"
           php_value open_basedir "none"
           php_value upload_tmp_dir "/var/www/horde/phptmp/"

11. Restart apache

12. Edit /var/www/horde/conf/conf.php and set

$conf['testdisable'] = false; 

13. Open the horde test page on any domain

Most of the settings should be ok now. However you might want to alter some of the default php garbage collection stuff.
Re-edit the /var/www/horde/conf/conf.php and disable the test page

14. Allowing users to change their password from Horde (optional)

Horde can enable to let people change their ISPConig password from within Horde. For this, Horde provides a Passwd addon that needs to be configured to work with ISPConfig
Install the addon and chown it to Apache user:
Horde also provides a simple way to alter configuration files with local values. This is done by copying an existing config file (e.g. conf.php) to conf.local.php. This can be usefull if you want to alter the default preference settings of some Horde applications e.g. use by default a 24h clock. So you can provide a homogenous starting configuration for new users. The same also goes for the Passwd addon. By using a local config file we make sure, a future update of horde won't override our settings.
The above command is one line.
Now edit the /var/www/horde/passwd/config/backends.local.php file and search for

$backends['hordesql'] = array (
'disabled' => false,

Alter that to

$backends['hordesql'] = array (
'disabled' => true,

Then find the block that starts with

$backends['sql'] = array (
  'disabled' => false,
  'name' => 'SQL Server',
  [...]
    // 'query_lookup' => 'SELECT user_pass FROM horde_users WHERE user_uid = %u',
    // 'query_modify' => 'UPDATE horde_users SET user_pass = %e WHERE user_uid = %u',
  ),
);

and replace the whole block with this

$backends['sql'] = array (
  'disabled' => false,
  'name' => 'SQL Server',
  'preferred' => '',
  'policy' => array(
    'minLength' => 7,
    'maxLength' => 64,
    'maxSpace' => 0,
    'minNumeric' => 1,
  ),
  'driver' => 'Sql',
  'params' => array(
    'phptype' => 'mysql',
    'hostspec' => 'localhost',
    'username' => 'root',
    'password' => '***',
    'encryption' => 'crypt-md5',
    'database' => 'ISPCONFIG_DATABASE',
    'table' => 'mail_user',
    'user_col' => 'email',
    'pass_col' => 'password',
    'show_encryption' => false
    // The following two settings allow you to specify custom queries for
    // lookup and modify functions if special functions need to be
    // performed. In places where a username or a password needs to be
    // used, refer to this placeholder reference:
    // %d -> gets substituted with the domain
    // %u -> gets substituted with the user
    // %U -> gets substituted with the user without a domain part
    // %p -> gets substituted with the plaintext password
    // %e -> gets substituted with the encrypted password
    //
    // 'query_lookup' => 'SELECT user_pass FROM horde_users WHERE user_uid = %u',
   // 'query_modify' => 'UPDATE horde_users SET user_pass = %e WHERE user_uid = %u',
  ),
);

Of course replace the password with the root mysql password and change the database name to your ISPConfig database name. Once this is changed, you can use the Passwd tool to change the password from within Horde.
The policy section lets you set various options for what the password must look like. In this setup it has to be at least 7 characters and it must contain at least 1 number and no white spaces. Check the beginning of this file to find out what other options there are.

15. Finals things

Once you have made all the changes, login with the administrative user for horde. The email user you set during the webmail-install script setup. Once logged in, go into the adminsitration section and then horde configuration and create all the necessary configs. To start with, you can use the button that just creates them all or you can chose to review the configuration for each horde application yourself and apply changes that you want.
Horde also offers further applications. Visit http://www.horde.org/apps to see what's there.
Horde also offers a RSS feed so that you'll be notified on newer versions and for updating see here: http://www.horde.org/apps/webmail/docs/UPGRADING

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