Don’t try to send an e-mail to an msn.com, hotmail.com, or live.com address from your Yale e-mail account; Microsoft is currently blocking all e-mails sent from mail.yale.edu to those domains. According to a message on the Yale ITS website, Yale is working to contact Microsoft to resolve the issue but does not know how long it will be before it will be fixed.
In other news, people actually still use Hotmail.
Update, 12:33 p.m. Wednesday: Hotmail users — many of whom are clearly very passionate about their e-mail service provider — can now sleep easy. ITS reports that the issue with Microsoft should now be resolved.