My typical behavior is reviewing the Inbox and Spam folders.

This is a decent system, because I can filter out the spam that I do want from my important email (Inbox).

But, this system breaks down when I get tons of emails from sources I never want to see email from, i.e. spam bots and hacked sites.

I tried to leverage SPF, and these spam bots are using valid sources, so that method is easily fooled.

I want a folder for blacklisting emails. For example, I want to drop a message into this folder, and it should automatically add the email to the block list. Also, I want it to smart learn from the messages I drop in the blacklist folder to find signatures to help blacklist emails automatically. 

Thoughts?