Interworking
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... services. Communities which require significant RFC 822std11(-> 2822prop) interworking
are recommended to require that their X.400 User Agents ...
... field. To overcome this, new extended JNT Mail field is defined.
This is chosen to align with the JNT recommendation for
interworking with full RFC 822std11(-> 2822prop) systems [Kille84b].
...