How can I get email from a catch-all address (on POP server) into Scalix for local distribution to users?

I've recently installed a Xandros Server which comes with Scalix.  I've setup the mail directory all OK and internal emails are sending and receiving with no problems.   I am also able to send emails out via the SMTP relay to the internet.

We have a domain with mail hosting provided that we can set up a catch all pop mailbox, what I would like to do is to get scalix to collect that email and then distribute it to the local users

[Yes I know the easiest thing is to ditch the hosting and point the MX record directly at the Scalix server but management want to keep the email hosting catch all address for the moment]