On 24/05/2010 00:35, John R. Levine wrote: > >> The only thing that leaves are non-participant MLMs and there really isn't >> much to be done with them. >> > We have one concrete failure scenario, in which someone who publishes > dkim=discardable sends mail to a MLM that as usual breaks the signature, a > subscriber's mail system carefully follows the ADSP and rejects that mail, > causing the subscriber to be bounced off the list. (This really happened, > on an IETF list.) The advice is obvious a) put a shim in front of your > MLM to reject discardable mail and b) the usual advice not to use ADSP at > all, but it definitely needs publishing. > > I'm surprised we haven't seen that problem on this list, since we have at > least one subscriber whose domain publishes dkim=discardable. I keep > having to fish his mail out of the spam folder. > Surely the stance of a dkim=discardable sender is that it is absolutely OK to discard affected messages if there is any reason at all for doubt and that, therefore, "non-participant" MLMs aren't, actually, breaking anything.
- Roland _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
