Improving filtering of SPAM...

[Nick Rosier]

Stupid autocorrect. s/postscript/postscreen/
Op 20-jun.-2013 22:31 schreef "Nick Rosier" <nick.rosier at gmail.com> het
volgende:

> Have you activated postscript in Postfix? It was a major improvement for
> me. The less spam makes it to amavisd, the better. And if you don't mind a
> little delay on some mails you can also install a greylisting server.
>
> Wietse describes a very good strategy (which I'm using)  here:
> http://www.postfix.org/POSTSCREEN_README.html
>
> N.
> Op 20-jun.-2013 22:19 schreef "Christopher Koeber" <ckoeber at gmail.com>
> het volgende:
>
>> Hello,
>>
>> I have AmavisD with the following software running on Gentoo Linux
>> (Kernel Version 3.8.13):
>>
>>
>>    1. Postfix (Version 2.10.)
>>    2. SpamAssassin (Version 3.3.2-r1)
>>    3. ClamAV (Version 0.97.7)
>>    4. DCC (Version 1.3.140-r1)
>>    5. Razor (Version 2.85-r1)
>>
>> There are perhaps quite a few other packages I have installed; I just
>> know these are the major ones I have installed.
>>
>> Anyway, everything works but quite frankly my users still get a
>> significant amount of spam coming through (no viruses whatsoever, so the
>> ClamAV aspect works great.)
>>
>> The core problem is that, from what I see from the logs the score for the
>> spam messages gets rated lower than zero so the system is learning these
>> messages as ham and as such the filter becomes less effective as time goes
>> on.
>>
>> Now, the current install isn't completely ineffective; it catches a great
>> deal of spam messages but my question stems from asking what can I do to
>> greatly increase the accuracy.
>>
>> Is there a guide somewhere on improving detection of spam with AmavisD? I
>> couldn't find such a guide. Much of the items mentioned for improving
>> SpamAssassin was within the "local.cf" file but I know AmavisD ignores
>> that (from what I read). I also know I can lower the tag/tag2/etc. numbers
>> but then valid mail gets caught.
>>
>> Any help in this area would be much appreciated.
>>
>> Thank you.
>>
>> Regards,
>> Christopher Koeber
>>
>
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