Re: [Asrg] Spam detection system proposal

["David F. Skoll" <dfs@roaringpenguin.com>]

On Wed, 5 Mar 2003, Jim Youll wrote:

> I think it can only work with a feedback mechanism so that users who
> receive the first messages can "report" them somewhere.

No, the system is totally automatic.  All it reports is that IP address
x.y.z.w submitted a message with a valid RCPT TO: or invalid RCPT TO:
address.  That's it.

> I think that overall, if you really want to manage spam, the mail
> delivery process has to be slowed down slightly to allow received
> spams at site A to be matched up with spams at B through Z and a
> probability-of-spam set.

My scheme doesn't care about message content.  It merely punishes those
with a large set of invalid recipient addresses on their mailing list.
My intuition tells me spammers are more likely to have bad addresses than
legitimate bulk e-mailers.  We need experiments to see if that's true.

> Two linked issues that arise are maintaining the privacy of the
> original message, and determining that two messages are fundamentally
> the same message, despite slight differences.

Again, I don't report or care about message content; only good or
bad RCPT TO: commands.  We don't even report actual recipient addresses.

--
David.
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