I need to add DKIM to a Postfix installation. I've found two implementations that work with Postfix. OpenDKIM (http://www.opendkim.org/), and dkim-milter (http://sourceforge.net/projects/dkim-milter/). The former claims to be a fork of the latter.
OpenDKIM appears to be the more active project, judging from releases and mailing list activity.
Which of these implementations (or another) should I use?