Re: Second, revised MDN Implementation Report

> Many options defined in RFC 2298 have not seen implementation or deployment
> and have been removed  from the current draft.  As such, the following changes
> have been made in <draft-vaudreuil-MDNbis-03.txt>:
> 
>         1) The dispositions "denied", and "failed" were removed from 
>            the document  reflecting the lack of implementation or usage 
>            at this time.
>
>       2)  The disposition modifiers "warning", "superseded", "expired", and
>           "mailbox-terminated" have not seen actual implementation and 
>           have been deleted from the draft.  The extension modifier, 
>           while not currently used,  has been retained for future 
>            extensibility.

I guess I wonder about this logic.  the dispositions don't seem like
protocol features to me, they seem like status codes. 

do we really think we need to deprecate any status code that doesn't
have at least two implementations currently generating it?

I can't say that I ever say much point in either "denied" or "failed" 
but the modifiers "superseded" "expired" and "mailbox-terminated"
certainly seem useful and I'm not sure how the MDN protocol is 
improved by removing them.

Keith