[ietf-dkim] Lists "BCP" draft available

[Rolf E. Sonneveld]

On 06/11/2010 10:49 PM, John R. Levine wrote:
>>>> ... So if we clarify that the recommended practice is to "silently
>>>>          
>>> discard" (as some  have described it), won't we have solved this
>>> particularly problematic work flow?
>>>
>>> You're right, then it just falls back to mail mysteriously disappearing.
>>>
>>>        
>> why can't the MLM send bounce back to sender's mail-from address?
>>      
> The MLM can't tell the difference between a rejection due to the recipient
> address being invalid and due to ADSP.  Rejecting due to ADSP is probably
> wrong due to the spec, but sending mail to a list from a domain publishing
> ADSP discardable is definitely wrong, so apportion the blame as you wish.
>
>    
>> John's response seems to imply that it is sender's responsibility not to
>> send to lists in first place (if they use discardable). But can we be sure
>> this will happen?
>>      
> Of course not.  That's an example of the reason that I don't find ADSP
> useful (as opposed to manually vetted discard lists.)  There's no way to
> tell whether the party publishing discardable understands what they're
> saying.
>    

And likewise there is no way to tell whether the party implementing 
discard lists understand what they're doing. IMHO, we should stay away 
from assuming the presence or absence of a given level of expertise of 
the mail admins on this earth.

/rolf