sent-mail existing but not visible

[spek]

Hi,

Since our migration the .sent-mail folders don't contain any data
in horde webmail. I tried to change some permissions but that didn't do anything. The folders themselve are visible in horde but they do not contain any data. I've even tried to create a new folder. Also that new folder becomes visible (e.g. ".sendmail-test").

This is the sentmail section of "/home/httpd/vhosts/webmail/horde/imp/config/prefs.php":

// save a copy of sent messages?
// a value of 0 = no, 1 = yes
$_prefs['save_sent_mail'] = array(
'value' => 1,
'locked' => false,
'shared' => true,
'type' => 'implicit'
);

// sent mail folder
$_prefs['sent_mail_folder'] = array(
'value' => 'sent-mail',
// For Exchange server uncomment the line below and delete the line above
// 'value' => 'Sent Items',
'locked' => false,
'shared' => true,
'type' => 'implicit'
);


When i try to send new mail with the "[x] save copy in sent-mail " checked, mail doesn't get saved.

Any suggestions?