Re: Last Call: draft-resnick-2822upd (Internet Message Format) to Draft Standard

Brian E Carpenter <> Sat, 05 April 2008 21:56 UTC

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Date: Sun, 06 Apr 2008 09:56:51 +1200
From: Brian E Carpenter <>
Organization: University of Auckland
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To: Frank Ellermann <>
Subject: Re: Last Call: draft-resnick-2822upd (Internet Message Format) to Draft Standard
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On 2008-04-06 03:29, Frank Ellermann wrote:
> Brian E Carpenter wrote:
>> My underlying concern is that 2822upd should not appear
>> ridiculous to anyone who looks at a typical mail header
>> and sees the X-headers.
> 2822upd specifies only about twenty mail header fields.
> The rest is either registered and specified elsewhere,
> or to some degree "unknown" (unregistered, unspecified,
> proprietary, private use, experimental, spam, and so on).

Sure. But X- is described *nowhere* in current documents;
the one example in provisional registration is marked as
"deprecated" on no basis whatever (there is nothing in
2822 or 2822upd or 3864 to suggest a "deprecated"
registration), and...

>> John's message reached me with X-Original-To,
> A draft about Original-* didn't make it so far, ...

I don't care about the details of unregistered headers.
I simply want to see a statement of reality in 2822upd.
It can be simple or complicated but IMHO it needs to

 X- headers are in widespread use.
 They are not part of this standard.
 They must not be relied on to have any particular semantics
 or even to be delivered.

OK, I've said all I want to say on this.

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