rfc2049.txt

用C#开发实现SMTP相关技术,能接收到带附件的邮件服务功能.

          "8bit", and "binary" transfer-encodings on multipart or
          message entities encapsulating "8bit" or "binary" data.

    (21)  In the section on MIME Conformance, "multipart/digest"
          support was added to the list of requirements for
          minimal MIME conformance.  Also, the requirement for
          "message/rfc822" support were strengthened to clarify
          the importance of recognizing recursive structure.

    (22)  The various restrictions on subtypes of "message" are
          now specified entirely on a subtype by subtype basis.

    (23)  The definition of "message/rfc822" was changed to
          indicate that at least one of the "From", "Subject", or
          "Date" headers must be present.

    (24)  The required handling of unrecognized subtypes as
          "application/octet-stream" has been made more explicit
          in both the type definitions sections and the
          conformance guidelines.

    (25)  Examples using text/richtext were changed to
          text/enriched.

    (26)  The BNF definition of subtype has been changed to make
          it clear that either an IANA registered subtype or a
          nonstandard "X-" subtype must be used in a Content-Type
          header field.

    (27)  MIME media types that are simply registered for use and
          those that are standardized by the IETF are now
          distinguished in the MIME BNF.

    (28)  All of the various MIME registration procedures have
          been extensively revised. IANA registration procedures
          for character sets have been moved to a separate
          document that is no included in this set of documents.

    (29)  The use of escape and shift mechanisms in the US-ASCII
          and ISO-8859-X character sets these documents define
          have been clarified: Such mechanisms should never be
          used in conjunction with these character sets and their
          effect if they are used is undefined.

    (30)  The definition of the AFS access-type for
          message/external-body has been removed.

    (31)  The handling of the combination of
          multipart/alternative and message/external-body is now
          specifically addressed.

    (32)  Security issues specific to message/external-body are
          now discussed in some detail.

Appendix C -- References

   [ATK]
        Borenstein, Nathaniel S., Multimedia Applications
        Development with the Andrew Toolkit, Prentice-Hall, 1990.

   [ISO-2022]
        International Standard -- Information Processing --
        Character Code Structure and Extension Techniques,
        ISO/IEC 2022:1994, 4th ed.

   [ISO-8859]
        International Standard -- Information Processing -- 8-bit
        Single-Byte Coded Graphic Character Sets
        - Part 1: Latin Alphabet No. 1, ISO 8859-1:1987, 1st ed.
        - Part 2: Latin Alphabet No. 2, ISO 8859-2:1987, 1st ed.
        - Part 3: Latin Alphabet No. 3, ISO 8859-3:1988, 1st ed.
        - Part 4: Latin Alphabet No. 4, ISO 8859-4:1988, 1st ed.
        - Part 5: Latin/Cyrillic Alphabet, ISO 8859-5:1988, 1st
        ed.
        - Part 6: Latin/Arabic Alphabet, ISO 8859-6:1987, 1st ed.
        - Part 7: Latin/Greek Alphabet, ISO 8859-7:1987, 1st ed.
        - Part 8: Latin/Hebrew Alphabet, ISO 8859-8:1988, 1st ed.
        - Part 9: Latin Alphabet No. 5, ISO/IEC 8859-9:1989, 1st
        ed.
        International Standard -- Information Technology -- 8-bit
        Single-Byte Coded Graphic Character Sets
        - Part 10: Latin Alphabet No. 6, ISO/IEC 8859-10:1992,
        1st ed.

   [ISO-646]
        International Standard -- Information Technology -- ISO
        7-bit Coded Character Set for Information Interchange,
        ISO 646:1991, 3rd ed..

   [JPEG]
        JPEG Draft Standard ISO 10918-1 CD.

   [MPEG]
        Video Coding Draft Standard ISO 11172 CD, ISO
        IEC/JTC1/SC2/WG11 (Motion Picture Experts Group), May,
        1991.

   [PCM]
        CCITT, Fascicle III.4 - Recommendation G.711, "Pulse Code
        Modulation (PCM) of Voice Frequencies", Geneva, 1972.

   [POSTSCRIPT]
        Adobe Systems, Inc., PostScript Language Reference
        Manual, Addison-Wesley, 1985.

   [POSTSCRIPT2]
        Adobe Systems, Inc., PostScript Language Reference
        Manual, Addison-Wesley, Second Ed., 1990.

   [RFC-783]
        Sollins, K.R., "TFTP Protocol (revision 2)", RFC-783,
        MIT, June 1981.

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

   [RFC-822]
        Crocker, D., "Standard for the Format of ARPA Internet
        Text Messages", STD 11, RFC 822, UDEL, August 1982.

   [RFC-934]
        Rose, M. and E. Stefferud, "Proposed Standard for Message
        Encapsulation", RFC 934, Delaware and NMA, January 1985.

   [RFC-959]
        Postel, J. and J. Reynolds, "File Transfer Protocol", STD
        9, RFC 959, USC/Information Sciences Institute, October
        1985.

   [RFC-1049]
        Sirbu, M., "Content-Type Header Field for Internet
        Messages", RFC 1049, CMU, March 1988.

   [RFC-1154]
        Robinson, D., and R. Ullmann, "Encoding Header Field for
        Internet Messages", RFC 1154, Prime Computer, Inc., April
        1990.

   [RFC-1341]
        Borenstein, N., and N.  Freed, "MIME (Multipurpose
        Internet Mail Extensions): Mechanisms for Specifying and
        Describing the Format of Internet Message Bodies", RFC
        1341, Bellcore, Innosoft, June 1992.

   [RFC-1342]
        Moore, K., "Representation of Non-Ascii Text in Internet
        Message Headers", RFC 1342, University of Tennessee, June
        1992.

   [RFC-1344]
        Borenstein, N., "Implications of MIME for Internet Mail
        Gateways", RFC 1344, Bellcore, June 1992.

   [RFC-1345]
        Simonsen, K., "Character Mnemonics & Character Sets", RFC
        1345, Rationel Almen Planlaegning, June 1992.

   [RFC-1421]
        Linn, J., "Privacy Enhancement for Internet Electronic
        Mail:  Part I -- Message Encryption and Authentication
        Procedures", RFC 1421, IAB IRTF PSRG, IETF PEM WG,
        February 1993.

   [RFC-1422]
        Kent, S., "Privacy Enhancement for Internet Electronic
        Mail:  Part II -- Certificate-Based Key Management", RFC
        1422, IAB IRTF PSRG, IETF PEM WG, February 1993.

   [RFC-1423]
        Balenson, D., "Privacy Enhancement for Internet
        Electronic Mail:  Part III -- Algorithms, Modes, and
        Identifiers",  IAB IRTF PSRG, IETF PEM WG, February 1993.

   [RFC-1424]
        Kaliski, B., "Privacy Enhancement for Internet Electronic
        Mail:  Part IV -- Key Certification and Related
        Services", IAB IRTF PSRG, IETF PEM WG, February 1993.

   [RFC-1521]
        Borenstein, N., and Freed, N., "MIME (Multipurpose
        Internet Mail Extensions): Mechanisms for Specifying and
        Describing the Format of Internet Message Bodies", RFC
        1521, Bellcore, Innosoft, September, 1993.

   [RFC-1522]
        Moore, K., "Representation of Non-ASCII Text in Internet
        Message Headers", RFC 1522, University of Tennessee,
        September 1993.

   [RFC-1524]
        Borenstein, N., "A User Agent Configuration Mechanism for
        Multimedia Mail Format Information", RFC 1524, Bellcore,
        September 1993.

   [RFC-1543]
        Postel, J., "Instructions to RFC Authors", RFC 1543,
        USC/Information Sciences Institute, October 1993.

   [RFC-1556]
        Nussbacher, H., "Handling of Bi-directional Texts in
        MIME", RFC 1556, Israeli Inter-University Computer
        Center, December 1993.

   [RFC-1590]
        Postel, J., "Media Type Registration Procedure", RFC
        1590, USC/Information Sciences Institute, March 1994.

   [RFC-1602]
        Internet Architecture Board, Internet Engineering
        Steering Group, Huitema, C., Gross, P., "The Internet
        Standards Process -- Revision 2", March 1994.

   [RFC-1652]
        Klensin, J., (WG Chair), Freed, N., (Editor), Rose, M.,
        Stefferud, E., and Crocker, D., "SMTP Service Extension
        for 8bit-MIME transport", RFC 1652, United Nations
        University, Innosoft, Dover Beach Consulting, Inc.,
        Network Management Associates, Inc., The Branch Office,
        March 1994.

   [RFC-1700]
        Reynolds, J. and J. Postel, "Assigned Numbers", STD 2,
        RFC 1700, USC/Information Sciences Institute, October
        1994.

   [RFC-1741]
        Faltstrom, P., Crocker, D., and Fair, E., "MIME Content
        Type for BinHex Encoded Files", December 1994.

   [RFC-1896]
        Resnick, P., and A. Walker, "The text/enriched MIME
        Content-type", RFC 1896, February, 1996.

   [RFC-2045]
        Freed, N., and and N. Borenstein, "Multipurpose Internet Mail
        Extensions (MIME) Part One: Format of Internet Message
        Bodies", RFC 2045, Innosoft, First Virtual Holdings,
        November 1996.

   [RFC-2046]
        Freed, N., and N. Borenstein, "Multipurpose Internet Mail
        Extensions (MIME) Part Two: Media Types", RFC 2046,
        Innosoft, First Virtual Holdings, November 1996.

   [RFC-2047]
        Moore, K., "Multipurpose Internet Mail Extensions (MIME)
        Part Three: Representation of Non-ASCII Text in Internet
        Message Headers", RFC 2047, University of
        Tennessee, November 1996.

   [RFC-2048]
        Freed, N., Klensin, J., and J. Postel, "Multipurpose
        Internet Mail Extensions (MIME) Part Four: MIME
        Registration Procedures", RFC 2048, Innosoft, MCI,
        ISI, November 1996.

   [RFC-2049]
        Freed, N. and N. Borenstein, "Multipurpose Internet Mail
        Extensions (MIME) Part Five: Conformance Criteria and
        Examples", RFC 2049 (this document), Innosoft, First
        Virtual Holdings, November 1996.

   [US-ASCII]
        Coded Character Set -- 7-Bit American Standard Code for
        Information Interchange, ANSI X3.4-1986.

   [X400]
        Schicker, Pietro, "Message Handling Systems, X.400",
        Message Handling Systems and Distributed Applications, E.
        Stefferud, O-j. Jacobsen, and P. Schicker, eds., North-
        Holland, 1989, pp. 3-41.