RE: [Asrg] RE: 2.a.1 Analysis of Actual Spam Data - Titan Key reduces spam attacks

["Terry Sullivan" <terry@pantos.org>]

On Wed, 6 Aug 2003 20:11:23 -0400, Elric Pedder wrote:

>How do you arrive at the "minimum of 4 additional automated
>emails" ?  If a 550 response is returned, a maximum of one
>automated e-mail is generated.  (Unless I'm missing something.)

As you pointed out later in your reply, each faux-550 response must 
be followed by an automated email message, addressed to 
whatever-the-return-address was.  That autoresponder message, 
intended to avoid (well, diminish) false positives, outlines the 
"procedure" necessary to actually send email to the address.  (Mea 
cupla, in the heat of the moment, I counted server responses as 
messages, and I shouldn't have.)  Still, for each hijacked return 
address, the sheer number of automated messages being passes around 
(and the corresponding burden on shared resources) is not diminished; 
at best, it is merely redirected. 

[snip]

>In an effective system I would imagine the 550 response to
>include details informing the sender on what has happened,
>rather than simply dropping the message.

Perzactly.

- Terry


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