Am 05.05.2014 20:45, schrieb James B. Byrne: > Forgive me if I do not understand what you are trying to convey. We already > have Postfix DKIM correctly signing emails originating in our domains and > passing through our outgoing smtp gateway. The problem is that mail that > comes to that host destined for a Mailman mailing list is not being signed > when it is forwarded out again. That is what I want to have fixed.
that is *not* a postfix problem, you need a recent mailman version there are millions of google hits https://www.google.com/#q=mailman+dmarc
