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Re: MX dot was (Re: [ietf-dkim] TXT wildcards SSP issues

2007-06-05 01:57:32

On Jun 4, 2007, at 4:35 PM, Damon wrote:


It is? If I sign everything for my domain, I'd like to be able to say that for both the top level domain, and all of the subdomains too, right?

I think it is better to say, '*' means: ...and everything else.

So the subdomains that are not currently signed are covered under the '*' rule. Which begs the question, if ~any~ subdomain is signed, wouldn't the top level have to have to be signed even though it may be .nomail?

An "all email signed" assertion creates an identical discovery problem as that of a statement of "no email sent." "No email sent" is relevant to the DKIM process. A "no email sent" assertion might provide protection against additional query traffic. It might also provide recipients lower overhead when dealing with spoofed signatures. It is not clear why a "no mail sent" assertion must be excluded from a policy statement. Surely not every subdomain will be signing messages and sending email.

-Doug
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