Outlook Rules for IMAP, read vs. unread messages

[Campy fan]

  I'm new to both Roundcube and IMAP. I'm using Outlook 2003 at work and using Roundcube to view my email when I'm out. The problem is that I can't get the emails I view in rc to transfer to my main Outlook inbox, which contains mail from my POP3 and IMAP accounts. The Outlook rule I setup to transfer apparently doesn't work for messages that are already read in Roundcube. I've got rc1 installed, but I cannot make the messages appear as "unread" Is there a way to do this? Or has anyone successfully created a rule in 2003 to transfer already read messages to the main Inbox? Does rc2 have the ability to mark messages as "unread"?