I am running postfix with anti spam filter (policyd-weight, sqlgrey, grossd, dkim, senderid-milter, dspam) . With this configuration, I am down to under 10 spams a day. Looking at my backend server which is exchange 2007, I find that all of the remaining spam messages have spam confidence level of 7 or greater, which implies this is blatant spam. Is there spam filter software software that works with postfix that can perform checks similar to that of exchange 2007 spam confidence level?
Thanks in advance
