Isn't Hotmail for most people, a secondary Email address, separate from their ISP, so they can SPAM other people? Maybe you are one of the few that doesn't SPAM, but it make more sense to exclude the entire source of crap, and let the individual select which Emails to allow from that source. I've never checked my SPAM folder, but don't use Email much. I get what I expect.
Pretty much anything connected to Microsoft, especially Windows, is trouble. Expect annoying problems that never seem to go away, and usually get worse...