Stephane Bortzmeyer,
Surveying the deployment of DKIM in the ".fr" top-level domain, I
notice the vast majority of domains with a _domainkey subdomain have a
A record for the subdomain (check jeunes-sapeurs-pompiers.fr or
journeedelentrepreneur.fr).
I do not think it is legitimate but I may miss something. Any
reasonable use of such a record?
They just have a wildcard DNS entry, a lookup for _domainkey or foo
or whatever would return the same A record:
$ host '*.jeunes-sapeurs-pompiers.fr'
*.jeunes-sapeurs-pompiers.fr has address 91.121.53.53
$ host '*.journeedelentrepreneur.fr'
*.journeedelentrepreneur.fr has address 194.206.126.204
As far as DKIM/DK is concerned, there is no _domainkey TXT record.
A presence of and A record does not mean anything special.
Mark
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