Egads.
Are you positive that your server isn't eating it?
I whitelisted yahoo in spam assassin. Now some of the domains can send mail and get junked, but the bobhoffman mail does not even get that far anymore.
I think yahoo must be worried as to the new ip addresses for my site. Maybe the new ip addresses were once spam.
I keep asking them in mails and they keep sending me a form answer to the faq that does not answer.
Other than yahoo, all is well though...this is definitely a yahoo thing I believe.