Best practice question: DKIM AND DomainKeys?

From: Steve Jenkins <steve_at_stevejenkins.com>
Date: Thu, 14 Oct 2010 20:19:24 -0700

I was running some deliverability tests today sending to Yahoo accounts, and
a look at the headers inside the Yahoo Mail client showed the following
line:

Authentication-Results: mta1083.mail.re4.yahoo.com from=gamerid.com;
domainkeys=neutral (no sig); from=gamerid.com; dkim=pass (ok)

I realize that DKIM is a newer standard, and that DomainKeys will likely
fade away soon enough, but since there are large mail providers (like Yahoo)
that still check for a valid DomainKeys sig, is there any benefit to having
OpenDKIM sign with BOTH? Any drawbacks?

Thx,

Steve
Received on Fri Oct 15 2010 - 03:19:32 PST