A large amount of the spam that I get consists of mail coming from all sorts of international domains.
If you do the Select All option, you should be warned that .US is also in that list.
you’re able to also choose to block message encodings.
Blocking Spam from International Senders in Windows Vista Mail
I don't personally use the Windows Mail client that comes with Windows Vista, but while I was researching how to use it to access my Gmail locally, I discovered a nice option in the Junk Email Options pane.
