I have email account A (using ISP Config) which forwards to account B on a different domain/server. In account A, I've also used ISP Config to setup Spam Assassin, and it's working well. However, the forwarding seems to happen before SpamAssassin kicks in, because all the spam is being forwarded to account B. How can I configure things such that SpamAssassin kicks in before the email is forwarded ? Thanks.