Re: Last Call: draft-resnick-2822upd (Internet Message Format) to Draft Standard
Simon Josefsson <simon@josefsson.org> Fri, 04 April 2008 13:03 UTC
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From: Simon Josefsson <simon@josefsson.org>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Subject: Re: Last Call: draft-resnick-2822upd (Internet Message Format) to Draft Standard
In-Reply-To: <47F57508.3040107@gmail.com> (Brian E. Carpenter's message of "Fri, 04 Apr 2008 13:23:36 +1300")
References: <20080403231146.5F0853A683E@core3.amsl.com> <47F57508.3040107@gmail.com>
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Date: Fri, 04 Apr 2008 15:03:32 +0200
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Brian E Carpenter <brian.e.carpenter@gmail.com> writes: > I am disturbed that the messy situation of X- headers, > created by RFC 2822's silence on the subject, has > not been fixed. Me too. > I believe it would be appropriate to document that although > X- headers are widely used, they are not part of the standard > format and their treatment by Internet MTAs MUST NOT be relied on, Agreed. Further, one could discuss that using X- have caused interop problems when standardizing the header field. Old applications only know about the X- form and would not know the non-X- form, which makes it difficult to standardize the X- header field. It may be preferable to avoid using X- in experiment intended to be standardized later on. This point of view may be more contentious than what you propose though. I'd be interested to understand if others share this opinion. > unless registered under RFC 3864. I'd prefer to avoid this escape mechanism. Can X-* headers really be registered under RFC 3864? RFC 822 says: Note: The prefatory string "X-" will never be used in the names of Extension-fields. This provides user-defined fields with a protected set of names. ... extension-field = <Any field which is defined in a document published as a formal extension to this specification; none will have names beginning with the string "X-"> /Simon _______________________________________________ IETF mailing list IETF@ietf.org https://www.ietf.org/mailman/listinfo/ietf
- Re: Last Call: draft-resnick-2822upd (Internet Me… Brian E Carpenter
- Re: Last Call: draft-resnick-2822upd (Internet Me… Frank Ellermann
- Re: Last Call: draft-resnick-2822upd (Internet Me… Simon Josefsson
- Re: Last Call: draft-resnick-2822upd (Internet Me… John C Klensin
- Re: Last Call: draft-resnick-2822upd (Internet Me… Brian E Carpenter
- Re: Last Call: draft-resnick-2822upd (Internet Me… Frank Ellermann
- Re: Last Call: draft-resnick-2822upd (Internet Me… Frank Ellermann
- Re: Last Call: draft-resnick-2822upd (Internet Me… John C Klensin
- Re: Last Call: draft-resnick-2822upd (Internet Me… Brian E Carpenter
- X-headers Dave Aronson
- Re: X-headers John C Klensin
- Re: Last Call: draft-resnick-2822upd (Internet Me… Pete Resnick
- Re: Last Call: draft-resnick-2822upd (Internet Me… Dave Crocker
- Re: Last Call: draft-resnick-2822upd (Internet Me… Brian E Carpenter
- Re: Last Call: draft-resnick-2822upd (Internet Me… Lisa Dusseault