In the immortal words of David Harris ([EMAIL PROTECTED]):
>
> I'm thinking of deploying RBL to try to cut down on spam, but before
> I did that I wanted to poke around and see how effective it might
> be. So, I gathered up some spam messages that I had received and
> looked up the mailserver's ipaddr in RBL using rbl.maps.vix.com and
> rbl.dorkslayers.com, and not one host was rejected from either RBL
> site. Even though I could see the messages looked like they were
> going trough an open relay.
>
> How good is this whole RBL thing anyway?
In my experience, the RBL is a _great_ tool for pressuring ISPs into
adopting rational anti-spam policies.
It is an _awful_ tool for actually cutting down on the amount of spam
an individual user gets. As your quick test above amply demonstrated,
the spammers just move their source addresses too quickly for the RBL
to be useful in stopping them.
ORBS (nee dorkslayers) is useful to system administrators in that they
will provide automatic reports on your netblocks, but isn't really any
more useful for actually lowering your spam intake, for mostly the
same reasons.
-n
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