Postfix with spamassassin. Acts as an anti-spam gateway for a domain. Scans and then relays.
I want to take mail that has been tagged as spam by spamassassin, and send it to a different mail server than non-spam. Both servers will accept mail for the same domain, but one is just a quarantine. All addressing stays intact.
Therefore I need to get postfix or spamassassin to route spam to one server and ham to another server. How can I achieve this?