[ietf-dkim] Lists "BCP" draft available

[Michael Deutschmann]

On 19 May 2010, John Levine wrote:
> If you already know what lists you're subscribed to, why would you do
> anything other than accept all the mail from the lists?

True, vanity domains likely won't bother to treat "rejectable"
differently than "except-mlist".  The only difference is in a case that
shouldn't happen.

But the advantage of "except-mlist" to vanity domains is that *many* more
senders are eligible to publish it.  They would otherwise use "unknown".

With the status quo, vanity domains can only protect themselves from
forgeries of:
  1. The minority of senders who truly send to no mailing lists
  2. Senders who recklessly assume that "all" is universally treated
     as "except-mlist"

---- Michael Deutschmann <michael at talamasca.ocis.net>