Hector,
Have you ever considered that the " laisez-faire dropping of mail by
operators" as you put it, is done to thwart spammers and email miners? My
system spends a great deal of time sending email to addresses that do not
exist to tell them the system rejected their email. Worse, it sends email
to people whose addresses have been spoofed telling them I rejected email
they never sent. My postmaster account is full of rejects of my rejects.
The whole idea of DKIM is to make email more reliable. If I have my DKIM
set to discardable I really don't want to have to process email telling me
that some spoofer's email was discarded. Why should my resources be used
for such a purpose when I didn't send the original in the first place?
I don't condone the practice of just dropping the mail, but sometimes
"standards" need to catch up with reality.
Regards,
Pete
----
Peter P. Benac, CCNA
Emacolet Networking Services, Inc
Web and Mail Hosting.
Phone: 252-657-9591
Web: http://www.emacolet.com
To have principles...
First have courage.. With principles comes integrity!!!
-----Original Message-----
From: dkim-ops-bounces(_at_)mipassoc(_dot_)org
[mailto:dkim-ops-bounces(_at_)mipassoc(_dot_)org]
On Behalf Of Hector Santos
Sent: Friday, October 31, 2008 05:18
To: MH Michael Hammer (5304)
Cc: dkim-ops(_at_)mipassoc(_dot_)org
Subject: Re: [dkim-ops] Q: "dkim=discardable"
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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