RE: [Asrg] 3. Proof-of-work analysis

["Hallam-Baker, Phillip" <pbaker at verisign.com>]

> Spamware could parallel connections to umpteen million recipients and
> send at full speed if all it had to do was wait.

Absolutely, this code is not your standard mail client stuff.

> > Or for that matter just don't respond with a 250 to their HELO for N
> > seconds and if they continue talking anyhow drop the connection
> > (something like this is in the current beta sendmail, 8.13.0beta.)
> 
> That works currently against spamware that pipelines illegally.  If it
> becomes more common, that spamware will become less common.

Problem is that there are lots of people using these techniques for
good reason. 'illegal' is a poor choice of language, SMTP is not an
act of parliament, nor is it a particularly great design. If you 
need to send out a million mails to your customers as Ebay does every 
day you cannot wait around a minute while someone's idiot sendmail
script runs.

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