Configuration for XAMS (http://www.xams.org)
by Stéphane LECLERC <sleclerc@actionweb.fr>

// allow vacation start/end dates
$rcmail_config['vacation_gui_vacationdate'] = FALSE;

// allow vacation subject
$rcmail_config['vacation_gui_vacationsubject'] = TRUE;

// allow HTML for vacation message 
$rcmail_config['vacation_gui_vacationmessage_html'] = FALSE;

// allow vacation forwarder
$rcmail_config['vacation_gui_vacationforwarder'] = FALSE;

// add MIME header before the message
$rcmail_config['vacation_message_mime'] = '';

[...]

// driver used for backend storage
$rcmail_config['vacation_driver'] = 'sql';

// database DSN
$rcmail_config['vacation_sql_dsn'] = 'mysql://user:password@localhost/xams';

// read data queries
$rcmail_config['vacation_sql_read'] =
        array("SELECT IF(STRCMP(pm_users.AutoReply,'true'), 0, 1) AS vacation_enable, " .
                 "pm_users.AutoReplySubject AS vacation_subject, " .
                 "pm_users.AutoReplyText AS vacation_message " .
                 "FROM xams.pm_sites " .
                 "INNER JOIN xams.pm_domains ON pm_sites.id = pm_domains.siteid " .
                 "INNER JOIN xams.pm_users ON pm_sites.id = pm_users.siteid " .
                 "WHERE pm_users.name = %email_local AND pm_domains.name = %email_domain;"
        );

// write data queries
$rcmail_config['vacation_sql_write'] =
        array("UPDATE xams.pm_users " .
                 "INNER JOIN xams.pm_sites ON pm_sites.id = pm_users.siteid " .
                 "INNER JOIN xams.pm_domains ON pm_sites.id = pm_domains.siteid " .
                 "SET pm_users.AutoReply = IF(%vacation_enable, 'true', 'false'), " .
                 "pm_users.AutoReplySubject = %vacation_subject, " .
                 "pm_users.AutoReplyText = %vacation_message " .
                 "WHERE pm_users.name = %email_local AND pm_domains.name = %email_domain;"
        );