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
etc.
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.