[ietf-dkim] Lists "BCP" draft available
roland.turner at boxsentry.com
Sun May 23 20:50:57 PDT 2010
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
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