<p dir="ltr">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. </p>
<p dir="ltr">Wietse describes a very good strategy (which I'm using) here: <a href="http://www.postfix.org/POSTSCREEN_README.html">http://www.postfix.org/POSTSCREEN_README.html</a></p>
<p dir="ltr">N. </p>
<div class="gmail_quote">Op 20-jun.-2013 22:19 schreef "Christopher Koeber" <<a href="mailto:ckoeber@gmail.com">ckoeber@gmail.com</a>> het volgende:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Hello,</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">
I have AmavisD with the following software running on Gentoo Linux (Kernel Version 3.8.13):</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default"><ol><li><font face="tahoma, sans-serif">Postfix (Version 2.10.)</font></li>
<li><font face="tahoma, sans-serif">SpamAssassin (Version 3.3.2-r1)</font></li><li><font face="tahoma, sans-serif">ClamAV (Version 0.97.7)</font></li><li><font face="tahoma, sans-serif">DCC (Version 1.3.140-r1)</font></li>
<li><font face="tahoma, sans-serif">Razor (Version 2.85-r1)</font></li></ol><div><font face="tahoma, sans-serif">There are perhaps quite a few other packages I have installed; I just know these are the major ones I have installed.</font></div>
<div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif">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.)</font></div>
<div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif">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.</font></div>
<div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif">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.</font></div>
<div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif">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 "<a href="http://local.cf" target="_blank">local.cf</a>" 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.</font></div>
<div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif">Any help in this area would be much appreciated.</font></div><div><font face="tahoma, sans-serif"><br></font></div>
<div><font face="tahoma, sans-serif">Thank you.<br><br></font></div></div><div>Regards,<br>Christopher Koeber</div>
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