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List:       opensuse
Subject:    Re: [opensuse] Can spam be defeated?
From:       J Sloan <joe () tmsusa ! com>
Date:       2006-12-20 22:50:25
Message-ID: 4589BE31.50004 () tmsusa ! com
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Steven T. Hatton wrote:
> It just keeps getting worse.  I really don't want to change my email address, 
> but it's all over the Internet, and the spammers are killing my inbox.  I 
> don't want to spend a lot of time on this issue, I just want to be able to 
> block these idiots.  I'm running a postfix mail server.  Is there an easy was 
> to thwart spam?  I use the filters built into KMail, but they seem almost 
> worthless.
If you are running your own mail server, that is the place to filter 
spam, not in a mail client. I get maybe 1 or 2 spam messages a day, 
although spammers try to send me perhaps 1000 spam messages per day. 
Just by using the cool tools that ship with suse, and in certain cases 
supplementing them with other open source tools, we block over 99% of 
the spam, reducing it to a manageable situation.

Layered defense is the key, and as I said, it's just a matter of using 
the open source tools:

1. Right up front, have postfix do sanity checks, greylisting, etc - 
that will block a large amount of spam with little effort.

2.  use amavis+spamassasin+clamav - very powerful tools that ship with 
suse, and if you supplement the stock rules with the best custom rules 
from rules emporium and goodies like the botnet plugin, the fuzzyocr 
plugin etc, that can takes the effectiveness of the filter from the 
80-90% range up to the 98-99% and better range.

3. For added convenience, install a quarantine management and automated 
spam reporting and bayes training system, which will make life much 
easier - I highly recommend maia mailguard for this.

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