Junk mail in Apple Mail still put into Inbox
Somehow, I got onto the lists of several email senders with whose politics I completely disagree. Although I have consistently sent them to the Junk folder in Apple Mail, any new ones go right to my Inbox. Why are they not being filtered and put automatically into the Junk folder? Many legitimate messages are put there in error.
I've set at least a couple of the senders to "Bounce" by marking messages from those senders in my Junk folder as ones that I want bounced, but that just gets me a bunch of messages saying that delivery failed. So now, instead of just sending all the awful political messages I get to Junk and deleting them, I am getting notifications of each bounced message.
All I want is either for the hateful messages to be put into Junk or for them to stop altogether. I haven't unsubcribed because I've read that all that does is to let the senders know that I actually exist. Any advice? I won't tell you all the kind of messages I'm getting, because some among you may agree with the senders' politics and point of view. That is your right, but since I don't share those views, I'd like to let the senders send their mail only to you. Thank you, everyone. I hope to get an answer or answers to my question.
MacBook, Mac OS X (10.6.8)