via the Oregon State University Network Engineering blog:
As some of you would know by now, the oregonstate.edu domain is being blocked by hotmail.com. This means that any email coming from our domain will bounce and not be delivered. I just want to give you guys a heads up and let you all know that I am working on getting us delisted from their system. A request has been submitted and I expect to hear back from them in a day or two.
One more reason not to use Hotmail. I think the list is up to more than 1,200 different reasons now. Ciao.