FWD: I-D ACTION:draft-klensin-email-envelope-00.txt

[John C Klensin <john-ietf@xxxxxxx>]

The draft posted/described in the attached is a bizarre idea, 
partially to see if it is possible to consider a radical 
solution to an increasingly troublesome problem, and partially 
to see if the supportive comments about "Email NG" in 
Minneapolis were really serious.

I am not at all convinced that it is a _good_ idea, only that, 
if we are talking about radical changes to the mail 
infrastructure to support various extended services, this is the 
sort of "clean up the warts that get in the way" option we might 
want to consider.

And even if it were a good idea, some of the details are 
probably not right -- if this looks like it received a day's 
thought, you would probably be guessing much too high.

Discussion should probably go to the SMTP list; IMAA is copied 
only because this could interact a bit with some of the "UTF-8 
header" discussions.

  john

--- Begin Message ---

• To: IETF-Announce: ;
• Subject: I-D ACTION:draft-klensin-email-envelope-00.txt
• From: Internet-Drafts@xxxxxxxx
• Date: Fri, 23 Jan 2004 15:59:11 -0500
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A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: A Cleaner SMTP Envelope for Internet Mail
	Author(s)	: J. Klensin
	Filename	: draft-klensin-email-envelope-00.txt
	Pages		: 0
	Date		: 2004-1-23
	
During the last few years, a number of proposals for
extensions or improvements to email have run into trouble with a
side-effect of mail relaying.  In the current Internet Mail model, every SMTP server is required to break strict layering by inserting one or more additional 'trace' headers into the message headers which are actually part of the SMTP payload.  Since the headers are
altered in transit, header-signing is not an available option, various
anti-spam and internationalization strategies are infeasible or much
more complex, and so on.  This document proposes to change the
Internet mail model to place the in-transit trace information in the
envelope, removing the requirement that relaying systems modify the
message payload.

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