Re: [ietf-smtp] Fwd: I-D Action: draft-melnikov-smtp-metadata-00.txt

I'm not sure this is constructive, but it's meant to be helpful.

AFAICT RFC3030 has not been widely adopted in practice. Why, do you think? 
Do you think the reason, whatever it is, will hurt the new extension 
unnecessarily?
Arnt

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