[imp] Configuration for Merak/Icewarp in servers.php

[Atheist]

Hello list!

I've got a configuration problem for a special type of mail server: Merak / Icewarp.

If I set the following configuration IMP ansers only with the message "no messages found".

$servers['webjanssen'] = array(
    'name' => 'XXX',
    'server' => 'mail.XXX.com',
    'hordeauth' => false,
    'protocol' => 'imap/notls',
    'port' => 143,
    'folders' => '',
    'namespace' => '',
    'maildomain' => '',
    'smtphost' => 'mail.XXX.com',
    'smtpport' => 25,
    'realm' => '',
    'preferred' => '',
    'dotfiles' => false,
    'hierarchies' => array()
);

Above IMP says that there is one message that I didn't read yet.

Do I use a false configuration? Do I have to set the folders-option?

Do anyone have any experiences in the combination of IMP with Merak/Icewarp?

Greets,
Torsten.