[Mimedefang] Re: Pre-Acceptance filtering (WAS: Re: recipient filter and RBLs)
David F. Skoll
dfs at roaringpenguin.com
Fri Dec 7 08:25:02 EST 2007
Dirk the Daring wrote:
> We may be arguing semantics here. If the spammer never reaches DATA,
> they *know* their crap is not going thru. Mission Failed. If they reach
> data, they can (possibly reasonably) *assume* that it has a chance to
> get thru.
No. They can only assume it might get through if they get a 2xx response
in response to the final "."
However, this is probably moot. I believe spammers just "fire-and-forget".
In other words, they don't seem to pay close attention to SMTP response
> I've seen some spam-for-hire arrangements that work based on a very
> small commission amount per E-Mail "successfully sent" and then a larger
> commission per sale. The spammer wants to recoup *something* for their
> large investment in millions of victim E-Mail addresses, while the
> company hiring the spammer doesn't want to pay serious money without sales.
Think about it. You're hiring a criminal to do work on your behalf,
and you're going to trust this very same criminal to give you accurate
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