Yahoo! does not do SPF. They also don't do DKIM yet. If you go to DKIM you
need to be careful because not everyone (google/gmail for example) has
upgraded to use the final version yet.

Scott K


On Tuesday 14 August 2007 17:09, Dave Brondsema wrote:
> I get many emails from yahoo that pass DKIM and do not have SPF records
> (I don't think.. this according to the spamassassin rule hits for the
> email). In fact, it is true of this very email via yahoogroups.com
>
> I would be interested in continuing support of it. Reimplementing for
> DKIM instead of DK would be nice, but obviously more work. I will see
> if I can get another query server running.. no promises :) I'll
> double-check SPF on yahoo emails too.
>
> Joshua Tauberer wrote:
> > I'm thinking of dropping support for DomainKeys from the extension
> > because 1) I'm having a non-trivial time installing the needed Perl
> > modules on my new web server to do the server-side half of it, and 2)
> > I'm not so interested anymore in providing a DK-checking server for
> > users of the extension (which existed since programming those checks
> > within the extension was difficult to program) since it uses up server
> > resources (that not much, but enough to notice).
> >
> > In my personal experience, very few mails fail SPF checks and have a DK
> > header. So I won't miss it, although I thought it was neat to have.
> >
> > This is a last call in case it's actually important to anyone. If you
> > want to help, you could:
> >
> > * Provide a new public 'query server' to do the server-side checks
> > * Implement the checks in native code within the extension to
> > avoid the need for a query server
> > * And optionally reimplement these things to conform to the new
> > DKIM spec that replaces DK.