MHS use of the X.500 Directory to support MHS Routing
RFC 1801

Document Type RFC - Experimental (June 1995; No errata)
Last updated 2013-03-02
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Network Working Group                                           S. Kille
Request for Comments: 1801                              ISODE Consortium
Category: Experimental                                         June 1995

   X.400-MHS use of the X.500 Directory to support X.400-MHS Routing

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  This memo does not specify an Internet standard of any
   kind.  Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Table of Contents

  1   Introduction                                                     3
  2   Goals                                                            3
  3   Approach                                                         5
  4   Direct vs Indirect Connection                                    6
  5   X.400 and RFC 822                                                8
  6   Objects                                                          9
  7   Communities                                                     10
  8   Routing Trees                                                   11
      8.1    Routing Tree Definition   .   .   .   .   .   .   .      12
      8.2    The Open Community Routing Tree   .   .   .   .   .      12
      8.3    Routing Tree Location     .   .   .   .   .   .   .      13
      8.4    Example Routing Trees     .   .   .   .   .   .   .      13
      8.5    Use of Routing Trees to look up Information   .   .      13
  9   Routing Tree Selection                                          14
      9.1    Routing Tree Order    .   .   .   .   .   .   .   .      14
      9.2    Example use of Routing Trees  .   .   .   .   .   .      15
          9.2.1    Fully Open Organisation     .   .   .   .   .      15
          9.2.2    Open Organisation with Fallback     .   .   .      15
          9.2.3    Minimal-routing MTA     .   .   .   .   .   .      16
          9.2.4    Organisation with Firewall  .   .   .   .   .      16
          9.2.5    Well Known Entry Points     .   .   .   .   .      16
          9.2.6    ADMD using the Open Community for Advertising      16
          9.2.7    ADMD/PRMD gateway   .   .   .   .   .   .   .      17
  10  Routing Information                                             17
      10.1   Multiple routing trees    .   .   .   .   .   .   .      20
      10.2   MTA Choice    .   .   .   .   .   .   .   .   .   .      22
      10.3   Routing Filters   .   .   .   .   .   .   .   .   .      25
      10.4   Indirect Connectivity     .   .   .   .   .   .   .      26
  11  Local Addresses (UAs)                                           27
      11.1   Searching for Local Users     .   .   .   .   .   .      30
  12  Direct Lookup                                                   30
  13  Alternate Routes                                                30

Kille                         Experimental                      [Page 1]
RFC 1801        X.400-MHS Routing using X.500 Directory        June 1995

      13.1   Finding Alternate Routes  .   .   .   .   .   .   .      30
      13.2   Sharing routing information   .   .   .   .   .   .      31
  14  Looking up Information in the Directory                         31
  15  Naming MTAs                                                     33
      15.1   Naming 1984 MTAs  .   .   .   .   .   .   .   .   .      35
  16  Attributes Associated with the MTA                              35
  17  Bilateral Agreements                                            36
  18  MTA Selection                                                   38
      18.1   Dealing with protocol mismatches  .   .   .   .   .      38
      18.2   Supported Protocols   .   .   .   .   .   .   .   .      39
      18.3   MTA Capability Restrictions   .   .   .   .   .   .      39
      18.4   Subtree Capability Restrictions   .   .   .   .   .      40
  19  MTA Pulling Messages                                            41
  20  Security and Policy                                             42
      20.1   Finding the Name of the Calling MTA   .   .   .   .      42
      20.2   Authentication    .   .   .   .   .   .   .   .   .      42
      20.3   Authentication Information    .   .   .   .   .   .      44
  21  Policy and Authorisation                                        46
      21.1   Simple MTA Policy     .   .   .   .   .   .   .   .      46
      21.2   Complex MTA Policy    .   .   .   .   .   .   .   .      47
  22  Delivery                                                        49
      22.1   Redirects     .   .   .   .   .   .   .   .   .   .      49
      22.2   Underspecified O/R Addresses  .   .   .   .   .   .      50
      22.3   Non Delivery  .   .   .   .   .   .   .   .   .   .      51
      22.4   Bad Addresses     .   .   .   .   .   .   .   .   .      51
  23  Submission                                                      53
      23.1   Normal Derivation     .   .   .   .   .   .   .   .      53
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