Re: [apps-discuss] I-D Action: draft-levine-trace-header-registry-01.txt
S Moonesamy <sm+ietf@elandsys.com> Mon, 23 January 2012 21:15 UTC
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Date: Mon, 23 Jan 2012 13:06:57 -0800
To: John Leslie <john@jlc.net>
From: S Moonesamy <sm+ietf@elandsys.com>
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Cc: apps-discuss@ietf.org
Subject: Re: [apps-discuss] I-D Action: draft-levine-trace-header-registry-01.txt
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Hi John, At 12:26 23-01-2012, John Leslie wrote: > Making the "should" lower-case doesn't fix that problem. See below. > I don't think that's necessary, though it wouldn't bother me, I think >it helps to have the body introduce these "new" trace headers. > > We could remove these "shoulds" just like I proposed for Section 4... [snip] > I don't like that text, especially the part claiming to quote, but >modifying. > > Many folks believe that a lower-case "should" is still a RFC2119 >keyword -- it's better not to open that argument. Suggested text for Section 3.2: This informative section is to delineate the history of thinking about Trace fields in mail-related specifications. [RFC4408] defines the "Received-SPF:" header field as a Trace field and specifies that it is added above all other "Received-SPF:" header fields. [RFC6376] specifies that the "DKIM-Signature:" header field is treated as a Trace field and that it is not be reordered. It mentions that the header field is prepended to the message. DomainKeys Identified Mail (DKIM) relies on maintaining the ordering of header fields as a change of any "DKIM signed" header field can invalidate the DKIM signature. [RFC5451] defines an "Authentication-Results:" header field. It mentions that the field is to be treated as a Trace field to get an idea of how far away authentication checks, such as DKIM and Sender Policy Framework [RFC4408] were done. [RFC5518] defines a "VBR-Info:" header field and mentions that a message can contain multiple occurrences of these header fields. The document relies on the terminology in [RFC5322] to say that the "VBR- Info:" header field is a "trace header field". It also specifies that the header fields is be added at the top of the header fields. [RFC5436] defines an "Auto-Submitted:" header to be added to notification messages generated by Sieve filtering rules. Section 2.7.1 says "The "Auto-Submitted:" header field is considered a Trace field, similar to "Received:" header fields (see [RFC5321])." For Section 4: The recommendation that trace header fields is to be kept in blocks is not always followed. Some implementations add any new header field at the top of the message block without determining whether it is a Trace field. BTW, see the discussion paragraph in Section 1. If anyone has an opinion about that, please send comments. Regards, S. Moonesamy
- [apps-discuss] I-D Action: draft-levine-trace-hea… John Levine
- Re: [apps-discuss] I-D Action: draft-levine-trace… John Leslie
- Re: [apps-discuss] I-D Action: draft-levine-trace… S Moonesamy
- Re: [apps-discuss] I-D Action: draft-levine-trace… Murray S. Kucherawy
- Re: [apps-discuss] I-D Action: draft-levine-trace… John Levine
- Re: [apps-discuss] I-D Action: draft-levine-trace… John Leslie
- Re: [apps-discuss] I-D Action: draft-levine-trace… S Moonesamy
- Re: [apps-discuss] I-D Action: draft-levine-trace… John Leslie
- Re: [apps-discuss] I-D Action: draft-levine-trace… Ned Freed