--On 29 March 2008 09:09:30 +0900 "Stephen J. Turnbull" <stephen@xemacs.org> wrote:
There's friction in their [SPF and DKIM] adoption because certain
features of
email (notably mail forwarding, but also some others) have no regard for these features.
By which you mean that SPF and DKIM in some configurations are as big a threat to Mailman as blacklisting for backscatter is, right?
Maybe, but it's a question of configuration, not principle. SPF is no particular problem, because emails passing through Mailman get new return paths. If your Mailman domain has good SPF records, then the only problem that could occur is with recipients having forwarding set up. Actually, Mailman should be a winner here, because the list member can change their entry in the list much more easily than they can do so in their friends' address books.
As far as DKIM is concerned, I think Mailman already can re-sign messages. I don't remember the details, though. Anyway, I think re-signing is the correct thing for a list to do. Again, Mailman is a winner here because it's capable of doing such things.
As far as configuration is concerned, of course if you misconfigure either of these things, you're screwed. But, the reasons that SPF and DKIM aren't universal yet are not specific to Mailman.
-- Ian Eiloart IT Services, University of Sussex x3148