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.
Tony.
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