Authenticating your domain using DomainKeys (the DKIM predecessor) is a practice that many larger senders have implemented. But why should smaller email marketers spend the time and effort to do get down with DKIM? Mark Brownlow points us to an interview with Mark Risher, the anti-abuse product manager for Yahoo! Mail. In the interview, Mark [Risher] explains that emails that aren’t authenticated with [DomainKey] signatures are deemed suspicious and routed through additional message-screening filters before getting to the recipient inbox.
“…this technology is something we felt would be very helpful for receivers so we can confer special privileges to a message. For this other message that lacks a signature, we can penalize it. We can treat it with more suspicion and run it through additional filters…” continue reading
According to Risher, 40 percent of all inbound mail to Yahoo addresses contains DomainKey authentication. That amounts to 1 Billion DomainKey messages per day. The other 60 percent are being sent through additional filters apparently. I wonder how many of them are not getting through?
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The other 60 percent are being sent through additional filters apparently