[ietf-dkim] Are subdomains like parent domains?

[Dave Crocker]

John Levine wrote:
>>> But I have to say, without any sort of domain blanket/coverage
>>> option, it seems like something is really missing here.
> 
> I'm seeing an implicit assumption that if someone has an opinion about
> mail from foo.com, they will have a similar opinion of mail from
> subdomains a.foo.com or a.b.foo.com, or a.b.c.foo.com.  I've been
> thinking about the mail I actually see, and I am having great
> difficulty finding even a small set of real life scenarios where that
> is true.

Good timing.  I had started thinking about the fact that DKIM's d= parameter 
allows differentiating among (sub) domain names.

The premise is that these would have different reputations.  The last thing 
one wants for that is a mechanism that groups them all together.

d/
-- 

   Dave Crocker
   Brandenburg InternetWorking
   bbiw.net