Subj : IM2000 - a possible cure for spam - does anybody have any real world experience with it?
To   : comp.os.linux
From : Jeff Silverman
Date : Wed Jun 16 2004 06:05 pm

People,

	There is a project called IM2000 which is a new E-mail architecture.  The
problem with SMTP is that the cost of dealing with SPAM is levied on the
receiver.  With IM2000, the cost of sending an E-mail is levied on the
sender, so there is an economic incentive for the sender to limit the
amount of mail sent.  There are some objections to this scheme, and (I am
hand waving now) I believe that the objections are of smaller concern than
the problem with SMTP and spam now.

	So for example, one of the reasons why spam can exist is that there is no
authorization method in SMTP and no way to verify that a mail message came
from who it says it comes from.  With IM2000, you get a message that there
is a message waiting for you, so then you have to contact the sender's
server to get the message.  That immediately tends to verify that the
message really came from where it says it comes from, because if you
misdirect the from address, then the messages won't be found.

	What I am looking for is an IM2000 implementation for Linux.  I am
running my own mail server on my linux server, and my ISP is supplying
just IP packets, no other services, so I think I am a good test case. 
But... does anybody have any experience with IM2000?  Does anybody know of
an IM2000 implementation, or is this still a theoretical or development
project?  If somebody has implemented it, how well did it work?


Many thanks,


Jeff

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