Yahoo blocking all my mail to any of their users

Anyone with a yahoo account does not receive my activation email. Does anyone know if there is someone I can contact about removing my domain off the list? I think I got on the list due to that stupid inactive email mod. Other than that, I've only recently sent out monthly newsletters and this has been going on for at least a year and I finally have some time to try to talk to someone about it.

Thanks.

If you don't have double opt-in and email unsub notices on every message, you can easily get black listed.
Try this tool:
Network Tools: DNS,IP,Email

Hmm...not listed on any of those.