[ietf-dkim] more on discardable, was Lists "BCP" draft
steve at wordtothewise.com
Wed May 26 07:48:29 PDT 2010
On May 26, 2010, at 7:00 AM, Jeff Macdonald wrote:
> On Mon, May 24, 2010 at 9:55 PM, Steve Atkins <steve at wordtothewise.com> wrote:
> On May 24, 2010, at 6:38 PM, John Levine wrote:
> > Since ADSP causes problems for innocent bystanders, I think it's
> > reasonable to decline A's mail in the first place. This is doubly
> > true since the ADSP RFC rather specifically says that you shouldn't
> > mark a domain discardable if its users send mail to lists.
> It causes no problems at all to innocent bystanders in that case - the
> recipient at domain B is a willing participant who has chosen both
> to pay attention to ADSP and to respond to it by rejecting, rather than
> discarding, mails labeled "discardable".
> Perhaps I missed something, but if domain B is rejecting email from the list Authored by A, then won't that cause a list member at domain B to be removed from the list as well? I think that is what John meant by innocent bystander. Most MLM remove subscribers after repeated bounces. I don't know if they are smart enough to look into why the message bounced.
That's exactly the issue, and not a theoretical one.
However, domain B is not an innocent bystander, as they intentionally configured their mail system to reject mail it shouldn't, and the recipients at domain B support that decision, on some level.
The mailing list operator is the one caught in the middle between two domains that have made bad decisions, so is an innocent bystander, but the level of inconvenience to them is pretty small, relative to the usual overhead of running a mailing list.
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