"Microsoft is simply deleting legitimate emails."
I can agree with this. As part of some calendar interoperability testing, I recently established a new Hotmail account. Sometimes, a confirmation email being sent to my account simply never arrives. Most of the time, it goes into the junk mail folder. But other times, the mail never shows up. Don't use Hotmail if you expect every email sent to you to get through Microsoft's filters, because some of them won't get through.