I am building a new mail server using postfix, courier and also roundcube. I would like to copy all mailboxes from my old server (they are in '/home/user/Maildir/' directories). And I've got problem with reading them by roundcube. I can see, using roundcube, user's mail directory in the new server (the path is same - it is /home/user/Maildir), all folders but no messages which are inside. Roundcube only displays a list of no-subject, no-size (0 kB) and no-content e-mails. I tried to use roundcube with messages caching in database (mysql) and without caching them. Effect was the same. Can anybody tell me what is the reason of this problem? Thank You very much!