This email was sent from yahoo.com which does not allow forwarding of emails via email lists. Therefore the sender's email address (dw_ewing@yahoo.com) has been replaced with a dummy one.

Except I have waaay too many archived yahoo emails, contacts who know my yahoo ID, etc, and it's only an issue here. You may not like yahoo, but they're no more shit that anyone else. Besides, you can expect other  providers to start playing the same games, and then where does that leave anyone following your piss-poor advice?