nat and forwarding messages after filter

[ajdin]

hello,


does anyone now how to hide mailscanner ip address and forward orginal 
sender ip after filtering?

we have mailscanner on one server and we point all traffic on destinatin 
port 25 to that server.

server is filtering but mail is received from ip from filter server not 
sender ip or source ip.

does anyone know how to forward message after spamassassin filter 
messsage in mailscanner.


kind reagrds.