Please use the mailing list to ask for support.

http://www.horde.org/mail/ contains a list of all available mailing lists.

We are using the password module for changing key users we could not 
implement it properly. I hope your help to correct deployment and 
configuration of this module.

Using WebMail Horde 3.1.1 + postfix + mysql (mail user bd) + 4.1.1 + 
cyrus IMP.

Mail users are stored in the database in MySQL (postfix) and the table 
is mailbox.

By changing the key results in the following text.
Failed to change password for Horde Authentication: User not found

This is the configuration of password file backend.php.

$ Backends ['composite'] = array (
   'Name' => 'Example All Services',
   'Preferred' =>'',
   'Password policy' => array (
       'MinLength' => 3,
       'MaxLength' => 15,
       'MinClasses' => 0,
   )
   'Driver' => 'composite',
   'Params' => array ('driver' => array (
       'Sql' => array (
           'Name' => 'Horde Authentication',
           'Driver' => 'sql',
           'Required' => true,
           'Params' => array (
               'Phptype' => 'mysql',
               'Hostspec' => 'localhost',
               'Username' => 'horde',
               'Password' =>'',
               'Encryption' => 'md5-hex',
               'Database' => 'horde',
               'Table' => 'horde_users'
               'User_col' => 'user_uid'
               'Pass_col' => 'user_pass'
               'Show_encryption' => false,
               'Query_lookup' => 'SELECT FROM mailbox WHERE email 
clear_password =% u',
               'Query_modify' => 'UPDATE mailbox SET password =% p 
clear_ WHERE email =% u',
           )
       )
       'Sql' => array (
           'Name' => 'Postfix',
           'Driver' => 'sql',
           'Required' => true,
           'Params' => array (
               'Phptype' => 'mysql',
               'Hostspec' => 'localhost',
               'Username' => 'postfix',
               'Password' => 'secret',
               'Encryption' => 'plain',
               'Database' => 'postfix',
               'Table' => 'mailbox',
               'User_col' => 'email',
               'Pass_col' => 'clear_password'
               'Show_encryption' => false
           )
        )
        'Smbpasswd' => array (
           'Name' => 'Samba Server',
           'Driver' => 'smbpasswd'
           'Params' => array (
           'Program' => '/ usr / bin / smbpasswd'
           'Host' => 'localhost',
           )
       )
   )),
);