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Re: message-identifiers vs. "new message" in draft-crocker-email-arch-04.txt

2005-04-08 12:26:13

On Fri April 8 2005 10:47, Tony Finch wrote:

On Fri, 1 Apr 2005, Bruce Lilly wrote:

Section 3.3 discusses message identifiers, but fails to note that the
Message-ID message header field is optional.  It also alludes to
multiple identifiers, but does not note that Received fields may
incorporate a msg-id in the optional "id" component.

Though the id item in Received: fields is not necessarily a Message-ID;
it may also be an MTA's queue ID.

If we're talking about architecture as designed, the Received field as
defined in RFC 822 absolutely requires a msg-id, complete with
local-part, '@', domain, and angle brackets.

If you're talking about (broken) implementations, that's another