On Fri, May 09, 2008 at 02:24:47PM +0200, Marcin Orlowski wrote:
Hi,
> I wonder if anyone tried to analyze his logs to find out how effective
> gray listing is. I'd probably prefer to allow all incoming mails (maybe
> with exceptions) and even disable DENIED_IP_IN_CC_RDNS blockers as it yet
> causes too much collateral damages I can accept, even 99% of the mails
> DENIED_IP_IN_CC_RDNS deny is spam, then I got still 1% remaining - and
> this ususally causes some problems, but I yet like to deny
> mass-flood-senders. Something which graylisting still shall fight with. So
> -> graylisting - how effective it really is for you?
I don't use spamdyke's graylisting; when I started using spamdyke, I already
had a similar, albeit less powerful solution based on tcpsvd and some
scripting. It only takes the IP of the client into account, not the sender
or the recipient address.
Based on some munin graphs, it appears that about 1/3 of all connecting IPs
are blocked by even this primitive graylist.
Andras
--
Andras Korn <korn at chardonnay.math.bme.hu>
<http://chardonnay.math.bme.hu/~korn/> QOTD:
A single fact can spoil a good argument.
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