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        RFC 1893:

        Title:      Enhanced Mail System Status Codes
        Author:     G. Vaudreuil
        Date:       January 1996
        Mailbox:    Greg.Vaudreuil@Octel.com
        Pages:      15
        Characters: 28,218
        Obsoletes/Updates: none

        URL:        ftp://ds.internic.net/rfc/rfc1893.txt


There currently is not a standard mechanism for the reporting of mail
system errors except for the limited set offered by SMTP (Simple Mail
Transfer Protocol0 and the system specific text descriptions sent in
mail messages.  There is a pressing need for a rich machine readable
status code for use in delivery status notifications (DSN).  This
document proposes a new set of status codes for this purpose.  This
RFC is the product of the Notifications and Acknowledgements
Requirements 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
USC/Information Sciences Institute