Internet Draft                                       Greg Vaudreuil 
     Expires in six months                           Lucent Technologies 
                                                           July 16, 2001 
                                         

                                 Extensions to  
                            Mail System Status Codes 

                        <draft-vaudreuil-1893ext-00.txt 

      

  Status of this Memo 

     This document is an Internet-Draft and is in full conformance with all 
     provisions of Section 10 of RFC 2026. 

     This document is an Internet Draft.  Internet Drafts are working 
     documents of the Internet Engineering Task Force (IETF), its Areas, 
     and its Working Groups.  Note that other groups may also distribute 
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     Internet Drafts are valid for a maximum of six months and may be 
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  Copyright Notice 

     Copyright (C) The Internet Society (2001).  All Rights Reserved. 

     This Internet-Draft is in conformance with Section 10 of RFC 2026. 

  Abstract 

     This document defines an additional set of extended status codes based 
     on new messaging applications and associated error states since the 
     creation of the original RFC 1893 document.  These include extended 
     media conversion codes for fax and voice messaging and results for 
     message tracking. 

      



     Internet Draft Mail System Status Code Extensions     July 16, 2001 


  Working Group Summary 

     None yet. 

  Document Conventions 

     The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", 
     "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this 
     document are to be interpreted as described in RFC-2119 [RFC2119]. 

  Table of Contents 

  1.   OVERVIEW ..........................................................2 
  2.   NEW STATUS CODES ..................................................2 
    2.1  Network and Routing Status ......................................2 
    2.2  Media Gateway Encodings .........................................3 
  3.   REFERENCES ........................................................4 
  4.   SECURITY CONSIDERATIONS ...........................................4 
  5.   COPYRIGHT NOTICE ..................................................5 
  6.   AUTHOR'S ADDRESS ..................................................5 
      

  1. Overview 

     Use of the Email infrastructure for the transmission of voice and fax 
     messages has identified additional, interesting error cases important 
     to enumerate.  Operational experience has also suggested additional 
     codes useful to diagnose messaging system failures. 

  2. New Status Codes 

     Here they are. 

  2.1 Network and Routing Status 

          X.4.8  Misrouted message 

                 A message was improperly routed to this MTA or gateway.  
                 This may have happened, for instance, because an MX 
                 record for the recipient's domain inappropriately 
                 directed traffic to the MTA, or because another MTA was 
                 inappropriately (and explicitly) configured to direct 
                 traffic for this recipient to the MTA reporting the 
                 error.   

                 It can also indicate a failure to properly configure the 
                 reporting MTA, when the MTA administrator intended that 
                 the MTA would accept traffic for recipients in that 
                 domain.  






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  2.2 Media Gateway Encodings 

     Experience with media translating gateways has demonstrated a need for 
     a richer set of error codes.  These codes provide additional detail 
     useful to enable an end-user to re-compose and resend a message more 
     likely to succeed.  For more information on media gateways and their 
     role in the Internet email architecture, see [CRITICAL]. 

          X.6.6   Fax media not supported 

                 Fax media is not supported by either the delivery 
                 protocol or the next system in the forwarding path. This 
                 error in a successful DSN indicates the message was 
                 delivered without the offending content.  

          X.6.7   Fax encoding not supported 

                 While fax media is supported, the specific fax encoding 
                 sent is not supported. This error in a successful DSN 
                 indicates the message was delivered without the offending 
                 content.  

          X.6.8   Voice media not supported 

                 Voice media is not supported by either the delivery 
                 protocol or the next system in the forwarding path. This 
                 error in a successful DSN indicates the message was 
                 delivered without the offending content. 

          X.6.9   Voice encoding not supported 

                 While voice media is supported, the specific audio 
                 encoding sent is not supported. This error in a 
                 successful DSN indicates the message was delivered 
                 without the offending content. 

          X.6.10 Text not supported 

                 Text media is not supported by either the delivery 
                 protocol or the next system in the forwarding path. This 
                 error in a successful DSN indicates the message was 
                 delivered without the offending content.  

          X.6.11 Text Character set not supported 

                 While Text media is supported, the specific character set 
                 or other encoding is not supported. This error in a 
                 successful DSN indicates the message was delivered 
                 without the offending content. 






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          X.6.12 Attachment type not supported 

                 The attachment is not supported by either the delivery 
                 protocol or the next system in the forwarding path.  An 
                 attachment is a content with a content-disposition of 
                 `
                 the message was delivered without the offending content. 

          X.6.13 Attachment too large 

                 The attachment is too large for the recipient mail system 
                 or protocol.  This error in a successful DSN indicates 
                 the message was delivered without the offending content. 

                  

  3. References 

     [SMTP] Postel, J., "Simple Mail Transfer Protocol", STD 10, RFC 821, 
     USC/Information Sciences Institute, August 1982. 

     [DSN] Moore, K., and G. Vaudreuil, "An Extensible Message Format for 
     Delivery Status Notifications", RFC 1894, University of Tennessee, 
     Octel Network Services, January 1996. 

     [CODES] G. Vaudreuil, "Extended Mail System Status Codes" work-in-
     progress, June 2001 

     [TIMELY] G. Kline and D. Crocker, "Timely Completion for Internet 
     Messaging Services", work-in-progress, June 2001. 

     [CONTENT E. Burger, "Critical Content for Internet Mail", work-in-
     progress, April 2001. 

  4. Security Considerations 

     This document describes additional status codes to describe failure 
     conditions with increased precision.  Use of these status codes may 
     disclose additional information about how an internal mail system is 
     implemented and it's capabilities beyond that currently available. 















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  5. Copyright Notice 

     "Copyright (C) The Internet Society (2001). All Rights Reserved. 

     This document and translations of it may be copied and furnished to 
     others, and derivative works that comment on or otherwise explain it 
     or assist in its implementation may be prepared, copied, published and 
     distributed, in whole or in part, without restriction of any kind, 
     provided that the above copyright notice and this paragraph are 
     included on all such copies and derivative works.  However, this 
     document itself may not be modified in any way, such as by removing 
     the copyright notice or references to the Internet Society or other 
     Internet organizations, except as needed for the purpose of developing 
     Internet standards in which case the procedures for copyrights defined 
     in the Internet Standards process MUST be followed, or as required to 
     translate it into languages other than English.  

     The limited permissions granted above are perpetual and will not be 
     revoked by the Internet Society or its successors or assigns. 

     This document and the information contained herein is provided on an 
     "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING 
     TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT 
     NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN 
     WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF 
     MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."  

  6. Author's Address 

     Gregory M. Vaudreuil  
     Lucent Technologies 
     7291 Williamson Rd 
     Dallas, TX 75214 
     Voice/Fax: +1-972-733-2722 
     GregV@ieee.org 


  7. Changes from -

     Fixed the title and filename to refer to the correct RFC. 

     Added references to media gateways. 

      

      

      







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