[ietf-dkim] DKIM adoption

[Steve Atkins]

On Jul 31, 2009, at 9:17 PM, Franck Martin wrote:

> I was curious by Scott comment re SPF.
>
> Is there a class of spam that cannot get a DKIM signature?
>
> I would think botnets would be that class, as they usually infect  
> computers and not sure they could DKIM sign as it would require them  
> to set a DNS entry too. Knowing that botnets are 70% of spam, if  
> DKIM could solve this one it would be great.

This is trivial for botnets to do. Apart from the obvious ways, many  
botnets already run DNS.

>
> so my question to add to your question "Does the presence of a  
> signature provide any objective data about the goodness or badness  
> of the signer?" is:
> is there a class of spam that cannot get a DKIM signature?

It says that the software generating the email was written at some  
point after 2007. Which is a data point, but not a terribly useful one.

Cheers,
   Steve