Something is amiss at yahoo.com. I received a ton of rejection
notices from yahoo.com, yahoo.br, yahoo.ca, etc.  I wound up
removing subscribers from my lists before I came across one
that I knew was valid because he posted something the previous
day. Then I started getting rejection notices from yahoo users
attempting to post to a list, but were no longer subscribed.

Darren Evans-Young
Listserv Adminstrator
The University of Alabama