he never said it had to do with OZ mail... although I would have actually leaned that way, too.
if you are getting messages that are REALLY long and include something like "brew" or "oz" in the actual message, the easiest thing you can do is call VZW and talk to tech support. They have access to the OZ Mail client and can stop the messages. In the event they cannot, it can be escalated to a trouble ticket where Nokia (who admins the client) can kill the messages.
don't wait... the sooner you call, the sooner you can be rid of them.
