FYI-
Yahoo has recently added something called Marketing Preferences. As a
result, your account may have been automatically set to receive what
they consider "valuable information", but you probably consider Spam.
To reset it, Go to:
http://subscribe.yahoo.com/showaccount
Sign in and then you should see "Edit Marketing Preferences". Make
the changes you want and then click the "Save Changes" button.
Dave Kornberg