I’m using OS X Mail. When I upgraded to Mountain Lion from Lion, my Spam folder disappeared. SpamSieve is still send spam somewhere, but I can’t figure out where, and there are some emails that I was supposed to receive and didn’t. I suspect they SpamSieve labeled them as Spam, since they were from new contacts, but I can’t find them anywhere, and I need to train them as good.
Where does the spam folder go when you upgrade to Mountain Lion?