In <AycG7eXF/FBRsIqh3QegLA(_dot_)md5(_at_)libertango(_dot_)oryx(_dot_)com> Arnt
Gulbrandsen <arnt(_at_)gulbrandsen(_dot_)priv(_dot_)no> writes:
Charles Lindsey writes:
Therefore, I would suggest using something based on the MIME
parameters, such as
Annotations: classification=top_secret;
archived-at="http://foo.example/123456";;
x-spamassassin-score=5
Note that this scheme is fundamentally incompatible with IMAP. In IMAP,
message headers are invariant. Once a client has downloaded a
particular field, it can cache that forever, so that field can never
change. (Search for msg-att-static in the IMAP RFC.)
There was no intention that this header would change once final delivery
had taken place (whether via POP3 or IMAP or anything else).
It would be generated by the sender of the message (or at the latest by
his submission agent). The 'x-spamassasin-score' was perhaps an
unfortunate example, as Keith has pointed out, because it implies that
additional parameters might be added in transit. But the ability for the
sender to add x-parameters is an important part of the idea, just as it is
for MIME parameters.
--
Charles H. Lindsey ---------At Home, doing my own thing------------------------
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