On Sun, Jan 3, 2010 at 2:59 PM, Kenneth Marshall <k...@rice.edu> wrote: > On Sun, Jan 03, 2010 at 10:02:32AM -0500, Roman Gelfand wrote: >> 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 >> > Hi Roman, > > To truly check how the Exchange 2007 spam confidence level works, > try passing all of the mail from postfix to the Exchange server. I > would be almost certain that more than 10 messages will make it > through a day. If not, then just use the Exchange processing and > you are done. If you do try the test, I would be interested in > the results so please post them.
No question, exchange 2007 leaves a lot to be desired compared to postfix, dspam and other filtering features. Believe me I have tried both. Without the edge server, I was getting in access of 400 spams a day. With the current setup I was getting at most 10 spams a day. Out of those ten spams, the spam confidence level ranged between 7-9 which tells exchange, without a doubt, this is spam. My thoughts are, it can't be that exchange caught it and postfix and friends didn't. Therefore, it must something to do with my postfix configuration and/or additional filtering servers and their configurations. I just saw one spam email where the policyd-weight is -8.5, as this ip is not blacklised, and SPF is PASS, but exchange's spam confidence level is 8. BTW.. Just for the features alone it is worth switching to postfix. I think it is light years ahead and without all the fluff. Thanks> > Regards, > Ken >
