Mailinglist Archive: opensuse (4610 mails)

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Re: [opensuse] Can spam be defeated?
  • From: J Sloan <joe@xxxxxxxxxx>
  • Date: Wed, 20 Dec 2006 14:50:25 -0800
  • Message-id: <4589BE31.50004@xxxxxxxxxx>
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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