[bitfolk] Shared spamd services

Hey guys I've deployed a simple deb box and iredmail and migrated my accounts in happily now. (iRedMail is a lazy script to deploy postfix, dovecot, clamd, spamassasin, roundcube and so fourth) Everything works ok but I'd like to stop swapping now and try and use the shared spamassasin mentioned here: http://www.bitfolk.com/customer_information.html#toc_2_SpamAssassin Typically in postfix this would be a content_filter directive, I had to nmap to find the open ports but I'm still at a loss on how this should be accessed, could anyone advise? I thought it would be something like this but I'm pretty sure not as that port is closed and theres mention of usernames: content_filter = smtp-amavis:[85.119.80.248]:10024 or: "content_filter = scan:[85.119.80.248]:XXX" ? I have only done a basic google on this but was wondering if maybe I'm barking up the wrong tree.. I'd really really love if we had shared amavis/clamd as thats a major mem hog Cheers -David