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Re: Security of DNSBL spam block systems
- From: Len Rose
- Date: Wed Jul 24 07:58:37 2002
On Tue, Jul 23, 2002 at 10:20:58PM +0200, Brad Knowles wrote:
>
> At 2:29 AM -0400 2002/07/23, Phil Rosenthal wrote:
>
> > IMHO Even the really large DNSBL's are barely used -- I think
> > (much) less than 5% of total human mail recipients are behind
> > a mailserver that uses one...
>
> Not true. There are plenty of large sites that use them (e.g.,
> AOL), and many sites use them to help ensure that they themselves
> don't get added to the black lists.
>
Is true.. those "large sites" still account for an infinitely small percentage
of the net.
> IMO, there is a serious risk of having DNSBL servers attacked and
> used as a DoS.
Yes, there is a risk but the exposure is negligble if it does occur. I'm
all for anti-spam measures but unless they're universally adopted and the
world governments start putting spammers out of business, these anti-spam
blacklists are more of an annoyance operated by a radical fringe of the
net.
I get 500-600 pieces of spam a day, and there is nothing I can do about it.
This topic has also been discussed to death before, the potential for a
DoS atatck is patently obvious to everyone.
[snipped]
(I also trimmed the Cc list)
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