I've had at least a dozen or so people sign up with a Yahoo account over the past couple months who have NEVER received any kind of email (even to their spam folders) from DKPsystem, so the removal of this awesome warning worries me.
As far as I can tell, the Yahoo situation has been fixed.
As for the Hotmail notification, it's been changed to simple advice of putting "
Notification[deleteme]@[deleteme]dkpsystem.com" on your white list.
Hotmail still filters the mail into the spam folder, though.