[ietf-dkim] I sign nothing / only only 3rd party / some mail

[Jim Fenton]

Paul Hoffman wrote:
> At 12:17 PM -0700 7/27/06, Steve Atkins wrote:
>> On Jul 27, 2006, at 12:08 PM, wayne wrote:
>>
>>> In <p06230903c0eeb486a116@[10.20.30.182]> Paul Hoffman
>>> <phoffman at proper.com> writes:
>>>
>>>> "I sign some mail" doesn't tell the recipient anything useful.
>>>>
>>>> What am I missing?
>>>
>>> It says that you should look at email without a signature as being
>>> "acceptable", unlike a "I sign all mail" which without a signature is
>>> quite questionable.
>>
>> How does that differ from a sender that doesn't have the
>> "I sign some mail" flag set?
>
> Yes, exactly.
Might the SSP record that says "I sign some mail", which could have a
long TTL, be more effectively cached by DNS than the (negative) caching
when there's no record?

-Jim