Re: [apps-discuss] Adoption of draft-kucherawy-received-state?

SM <sm@resistor.net> Thu, 19 January 2012 00:27 UTC

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Date: Wed, 18 Jan 2012 15:58:46 -0800
To: John C Klensin <john-ietf@jck.com>
From: SM <sm@resistor.net>
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Subject: Re: [apps-discuss] Adoption of draft-kucherawy-received-state?
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Hi John,
At 14:35 18-01-2012, John C Klensin wrote:
>I had a major system failure on Sunday, may have lost some hours
>of email, and, while I got an alternate server up early Monday,

I hope that everything is fine now.

>I have been only only slowly digging out.  The discussion seems
>to have progressed significantly after I dropped out, including
>a couple of new I-Ds.  While I hope those could be consolidated
>to the degree possible, I think the idea of getting these things
>registered is just great.

I sent John Levine the XML.  There may be a few controversies down 
the road as the topic touches both RFC 5321 and 5322.

>fields to try to "correct" them).  The multiple-path FOR form is
>still seen in the wild, despite the security issues and language
>in 5321 deprecating it. If multiple paths or mailboxes are used
>with FOR, the beginning of the [Additional-Registered-Clauses]
>becomes ambiguous, at least in theory.

That was issue #37.

>I have no doubt that Ned, or anyone else even half as competent,
>can sort this out and has implementations that do so.  I believe
>that any MUA that is really as robust as 5322 MUAs are supposed
>to be (indeed required to be to deal with other common erroneous
>practices) can get it right.  But we see intermediate MTAs and
>post-delivery filters trying to check these fields for bogus
>information as part of spam assessments, and some of those are
>not too bright.

Yes.

I tested the example in draft-kucherawy-received-state with some CPAN 
code and it did not cause any problems.  I don't know the effects on 
legacy code.  I vaguely recall coming across a parser bug a few years 
back when parsing a "Received:" header field inserted by a MTA implementation.

Regards,
-sm