Noel Jones wrote:
Define content_filter in main.cf pointing to the spam processing machine, define a new smtpd listener in master.cf listening on a different port.http://www.postfix.org/FILTER_README.htmlAmavisd-new is software often used as a postfix content_filter. Even if you're using something different, the postfix setup is pretty much the same.http://www.ijs.si/software/amavisd/README.postfix.html
What's the difference between "content_filter" and "relayhost"? -- Daniel