I wondering how everyone else approaches DKIM and DomainKeys.
I'm starting to see a lot of implementations now and have recently started adding DKIM and DomainKeys verification to my outbound mail.
Two things strike me:
1) The number of DKIM users also adding DomainKeys
2) The number of DKIM and DomainKeys signed domains that remain in test mode. Example, Yahoo! and Amazon.
Do you still use both DKIM and DomainKeys? If so, why?
Do you leave your domain in test mode? Or are you fully confident of your implementation?
Currently I support both, but dropping DomainKeys seems like the right thing to do, DKIM is the way forward, so can anyone tell me why I should still do DomainKeys? Is backward compatibility important?