Blacklist a Country

I have some questions on The SpamAssassin Lists
I can do specific domains for white listing but nothing
with wild cards.
I’ve tried different syntax but can’t seem to get it right.

  1. Are there wild cards? Whitelist all from @*

  2. Is there a way to blacklist an entire country with
    the SpamAssassin Configuration?

Say block everything from .ru or .pl or only allow - say .com .net .org .uk

  1. What’s the syntex to block an IP or range of IP’s ?

  2. Do blacklisted junk mails get bounce or put in the
    Junk Mail folder?