[ietf-dkim] Corner cases and loose ends, was , draft-vesely-dkim-joint-sigs

[Ian Eiloart]

--On 28 September 2010 01:09:07 -0700 Michael Deutschmann 
<michael at talamasca.ocis.net> wrote:

> On 2010-09-27, John R. Levine wrote:
>> And since this group seems to be obsessed with arcane corner cases,
>> what do you do with a discardable message if it's sent to two addresses,
>> one of which is a mailing list and one of which isn't?
>
> That's a trivial specific case, of a general problem important in
> spamfighting.  While a perfect solution would indeed require an extension
> to SMTP, we have ways to approach it.

LMTP would be a fine extension to SMTP, for these purposes.

But why not accept, then later bounce, messages with good DKIM signatures? 
That should be acceptable where the signing domain and return-path domain 
match, should it not? Otherwise, send the notification to the author.

-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
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