ietf-asrg
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Re: [Asrg] Spam detection system proposal

2003-03-05 09:19:38
Consider:  To receive DSN notifications, the spammer can expect to
receive between 10-20% of all the mail he sends out.  Sending
1,000,000 messages to different addresses is cheap.  Receiving 100,000
to 200,000 copies of that same message to a single address (or even a
few addresses) is not.

so the spammer pays that price once to clean up his list, and after
that, he only gets a few bounces back each time.

If the spammer doesn't want to receive the message body in the DSN's,
he or she will have to use a bulk precedence header. :-) 

which is not an indication of spam, and shouldn't be treated as such.

Keith
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