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Re: Re: draft-duan-smtp-receiver-driven-00.txt

2005-05-11 08:35:32

On Tue May 10 2005 22:50, Kartik Gopalan wrote:
That's why DMTP  *is* backward-compatible
and would work with any legacy SMTP MTAs.

It most certainly is not backwards compatible:
o it foists "new" response codes on servers w/o negotiation
o it adds new requirements for long-term storage of messages

That's simply unacceptable for an extension to a core applications
protocol which carries mission-critical payloads.  There is an
established extension mechanism (RFC 1869).  See RFCs 1870, 2920,
and 3461 for examples of how to extend the protocol in a backwards
compatible manner.