Interworking
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... services. Communities which require significant RFC 822std11(-> 2822prop) interworking
should require that their X.400 User Agents ...
... Sender: 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 ...