MH Michael Hammer (5304) wrote:
I wrote the language in the ADSP draft, and that is what I meant when
I wrote it.
Then you should have wrote what you meant rather than what you wrote
which doesn't match what you now say is the intent. Sometimes semantics
are important.
I have viewed in John's world that DISCARD was 100% about silently
dropping mail with no blow back in a POST SMTP world.
There is a major different between DISCARD and REJECT.
DISCARD helps POST SMTP systems who PER 821/2821/5321 you MUST create
bounces for undeliverable mail. ASDP/DISCARD removes this requirement.
In dynamic SMTP systems, a REJECT does not produce blow back. A REJECT
would be the same as a DISCARD.
The problem with ASDP is that its not cooperative with standard
practice and it will reduce mail delivery reliability and more higher
concern, it further encourages the laisez-faire dropping of mail by
operators.
But I do understand why it was introduced.
IMV, it will only work reliably, meaning no harm in mail lost, in
dynamic SMTP DKIM verification systems - where a dkim verification
DISCARD effectively rejects the transaction at the SMTP level. But
within a SMTP reception/accept first environment with a post SMTP DKIM
verification process, DISCARD promotes mail delivery reliability
problems because it removes the BOUNCE concept.
In that vain, ASDP is BAD for EMAIL.
--
Sincerely
Hector Santos, CTO
http://www.santronics.com
http://santronics.blogspot.com
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