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authorGraham Wilson <graham@mknod.org>2004-11-29 16:40:04 +0000
committerGraham Wilson <graham@mknod.org>2004-11-29 16:40:04 +0000
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Remove RFCs from the trunk, since we don't distribute them anyways. All of the removed RFCs are listed in the design-notes.html file, with the exception of NNTP (RFC977). Also add a link to the "LAN Mail Protocols" document to the design-notes.html file.
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-Network Working Group G. Vaudreuil
-Request for Comments: 1892 Octel Network Services
-Category: Standards Track January 1996
-
-
- The Multipart/Report Content Type
- for the Reporting of
- Mail System Administrative Messages
-
-Status of this Memo
-
- 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.
-
-1. The Multipart/Report MIME content-type
-
- The Multipart/Report MIME content-type is a general "family" or
- "container" type for electronic mail reports of any kind. Although
- this memo defines only the use of the Multipart/Report content-type
- with respect to delivery status reports, mail processing programs
- will benefit if a single content-type is used to for all kinds of
- reports.
-
- The Multipart/Report content-type is defined as follows:
-
- MIME type name: multipart
- MIME subtype name: report
- Required parameters: boundary, report-type
- Optional parameters: none
- Encoding considerations: 7bit should always be adequate
- Security considerations: see section 4 of this memo.
-
- The syntax of Multipart/Report is identical to the Multipart/Mixed
- content type defined in [MIME]. When used to send a report, the
- Multipart/Report content-type must be the top-level MIME content type
- for any report message. The report-type parameter identifies the
- type of report. The parameter is the MIME content sub-type of the
- second body part of the Multipart/Report.
-
- User agents and gateways must be able to automatically determine
- that a message is a mail system report and should be processed as
- such. Placing the Multipart/Report as the outermost content
- provides a mechanism whereby an auto-processor may detect through
- parsing the RFC 822 headers that the message is a report.
-
-
-
-
-Vaudreuil Standards Track [Page 1]
-
-RFC 1892 Multipart/Report January 1996
-
-
- The Multipart/Report content-type contains either two or three sub-
- parts, in the following order:
-
- (1) [required] The first body part contains human readable message.
- The purpose of this message is to provide an easily-understood
- description of the condition(s) that caused the report to be
- generated, for a human reader who may not have an user agent
- capable of interpreting the second section of the
- Multipart/Report.
-
- The text in the first section may be in any MIME standards-track
- content-type, charset, or language. Where a description of the
- error is desired in several languages or several media, a
- Multipart/Alternative construct may be used.
-
- This body part may also be used to send detailed information
- that cannot be easily formatted into a Message/Report body part.
-
- (2) [required] A machine parsable body part containing an account
- of the reported message handling event. The purpose of this body
- part is to provide a machine-readable description of the
- condition(s) which caused the report to be generated, along with
- details not present in the first body part that may be useful to
- human experts. An initial body part, Message/delivery-status is
- defined in [DSN]
-
- (3) [optional] A body part containing the returned message or a
- portion thereof. This information may be useful to aid human
- experts in diagnosing problems. (Although it may also be useful
- to allow the sender to identify the message which the report was
- issued, it is hoped that the envelope-id and original-recipient-
- address returned in the Message/Report body part will replace
- the traditional use of the returned content for this purpose.)
-
- Return of content may be wasteful of network bandwidth and a variety
- of implementation strategies can be used. Generally the sender
- should choose the appropriate strategy and inform the recipient of
- the required level of returned content required. In the absence of
- an explicit request for level of return of content such as that
- provided in [DRPT], the agent which generated the delivery service
- report should return the full message content.
-
- When data not encoded in 7 bits is to be returned, and the return
- path is not guaranteed to be 8-bit capable, two options are
- available. The origional message MAY be reencoded into a legal 7 bit
- MIME message or the Text/RFC822-Headers content-type MAY be used to
- return only the origional message headers.
-
-
-
-
-Vaudreuil Standards Track [Page 2]
-
-RFC 1892 Multipart/Report January 1996
-
-
-2. The Text/RFC822-Headers MIME content-type
-
- The Text/RFC822-Headers MIME content-type provides a mechanism to
- label and return only the RFC 822 headers of a failed message. These
- headers are not the complete message and should not be returned as a
- Message/RFC822. The returned headers are useful for identifying the
- failed message and for diagnostics based on the received: lines.
-
- The Text/RFC822-Headers content-type is defined as follows:
-
- MIME type name: Text
- MIME subtype name: RFC822-Headers
- Required parameters: None
- Optional parameters: none
- Encoding considerations: 7 bit is sufficient for normal RFC822
- headers, however, if the headers are broken and require
- encoding, they may be encoded in quoted-printable.
- Security considerations: see section 4 of this memo.
-
- The Text/RFC822-headers body part should contain all the RFC822
- header lines from the message which caused the report. The RFC822
- headers include all lines prior to the blank line in the message.
- They include the MIME-Version and MIME Content- headers.
-
-3. References
-
- [DSN] Moore, K., and G. Vaudreuil, "An Extensible Message Format for
- Delivery Status Notifications", RFC 1894, University of
- Tennessee, Octel Network Services, January 1996.
-
- [RFC822] Crocker, D., "Standard for the format of ARPA Internet Text
- Messages", STD 11, RFC 822, UDEL, August 1982.
-
- [MIME] Borenstein, N., and N. Freed, "Multipurpose Internet Mail
- Extensions", RFC 1521, Bellcore, Innosoft, June 1992.
-
- [DRPT] Moore, K., "SMTP Service Extension for Delivery Status
- Notifications", RFC 1891, University of Tennessee, January 1996.
-
-4. Security Considerations
-
- Automated use of report types without authentication presents several
- security issues. Forging negative reports presents the opportunity
- for denial-of-service attacks when the reports are used for automated
- maintenance of directories or mailing lists. Forging positive
- reports may cause the sender to incorrectly believe a message was
- delivered when it was not.
-
-
-
-
-Vaudreuil Standards Track [Page 3]
-
-RFC 1892 Multipart/Report January 1996
-
-
-5. Author's Address
-
- Gregory M. Vaudreuil
- Octel Network Services
- 17060 Dallas Parkway
- Dallas, TX 75248-1905
-
- Phone: +1-214-733-2722
- EMail: Greg.Vaudreuil@Octel.com
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-Vaudreuil Standards Track [Page 4]
-