[ietf-dkim] Underscore considerations

[Douglas Otis]

On Jun 9, 2006, at 1:41 PM, Stephen Farrell wrote:
>
> Pity none of them involved an underscore.

The terminology 'key is "referenced" or "located"' use a '_domainkey'  
subdomain.

                                      . <- root
                                 <tld>. <- <tld>
                          <name>.<tld>. <- registered <name>
         <sel>._domainkey.<name>.<tld>. <- key @ <name>.<tld>
<sel>._domainkey.<any-s>.<name>.<tld>. <- key @ <any-s>.<name>.<tld>

<tld>   = any top level domain
<name>  = any registered domain or second level domain
<any-s> = any subdomain or sequence of subdomains
<sel>   = label or labels found within the 's=' parameter

-Doug