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Re: (lack of) message header field ordering

2005-03-11 08:44:01

On Fri March 11 2005 09:33, Tony Finch wrote:

I'm talking about the following part of the syntax, which gives the
resent- fields a special status w.r.t. the trace fields, and does not
allow anyone to extend the message format with new header fields which
(like resent-*) appear amongst the Received: fields.

fields          =       *(trace
                          *(resent-date /
                           resent-from /
                           resent-sender /
                           resent-to /
                           resent-cc /
                           resent-bcc /
                           resent-msg-id))
                        *(orig-date /
                          ...

In light of the fact that ordering is not significant and
cannot be guaranteed, why does it matter -- how does:

                        optional-field)

from the same section not work?