I've had the same problem with the "Page Not Found" when trying to access Horde from the control panel, which I need to do to clear spam, re-route emails, & etc. I've submitted a trouble ticket, but have had no success for several weeks. Some of the domains I maintain are getting a huge amount of junk in the default (catch-all) address, and I really need to get this cleared up. Yes, I've tried accessing the catch all through the webmail route (domain.com/webmail), but havew had no luck. Any suggestions or recommendations?