Re: IETF SMTP Working Group Proposal at smtpng.org

[Brad Knowles <brad.knowles () skynet be>]

At 7:20 PM -0500 2002/08/21, J.A. Terranson wrote:

>  Presenting a computationally difficult problem to a connecting MTA
>  moves the requirement for the CPU power to the sender while keeping
>  the recipient site unfettered.  Let's face it, the spam problem is
>  merely one of cost shifting from sender to reciever, and this
>  proposal shifts the load back.  Any site that wishes to maintain
>  the current system of email subsidies to the sender domain need
>  only provide a computationally simple token.

	Now this is more plausible.  You'd still need something akin to a 
PKI to distribute the computationally simple tokens, and you'd need a 
way to easily revoke them.  But if this was implemented by default in 
the standard MTAs, you would go from hundreds or thousands of message 
deliveries per minute to five or more minutes per un-authenticated 
message delivery.

	This is something that might be worth discussing in the 
appropriate forums, such as the SMTP-related working groups of the 
IETF.

--
Brad Knowles, <brad.knowles () skynet be>

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
    -Benjamin Franklin, Historical Review of Pennsylvania.

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