RFC 3459 on Critical Content Multi-purpose Internet Mail Extensions (MIME) Parameter

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        RFC 3459

        Title:      Critical Content Multi-purpose Internet Mail
                    Extensions (MIME) Parameter
        Author(s):  E. Burger
        Status:     Standards Track
        Date:       January 2003
        Mailbox:    e.burger@ieee.org
        Pages:      24
        Characters: 54282
        Updates:    3204

        I-D Tag:    draft-ietf-vpim-cc-08.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3459.txt


This document describes the use of a mechanism for identifying body
parts that a sender deems critical in a multi-part Internet mail
message.  The mechanism described is a parameter to
Content-Disposition, as described by RFC 3204.

By knowing what parts of a message the sender deems critical, a
content gateway can intelligently handle multi-part messages when
providing gateway services to systems of lesser
capability.  Critical content can help a content gateway to decide
what parts to forward.  It can indicate how hard a gateway should try
to deliver a body part.  It can help the gateway to pick body parts
that are safe to silently delete when a system of lesser
capability receives a message.  In addition, critical content can
help the gateway chose the notification strategy for the receiving
system.  Likewise, if the sender expects the destination to do
some processing on a body part, critical content allows the sender
to mark body parts that the receiver must process.

This document is a product of the Voice Profile for Internet Mail
Working Group of the IETF.

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
standardization state and status of this protocol.  Distribution
of this memo is unlimited.

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Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

...

Below is the data which will enable a MIME compliant Mail Reader 
implementation to automatically retrieve the ASCII version
of the RFCs.
<ftp://ftp.isi.edu/in-notes/rfc3459.txt>

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