Anti-spam Settings

What is spam?
How to deal with spams?
What is blacklist,and how to configure?
What is whitelist,and how to configure?
What is filter,and how to configure?
How to configure anti-spam levels?
How to keep from spams?
If I receive a spam and the sender is me,what's the matter?
How to know where the real send from?
Why is my account blocked?
How to report the spam you received?
When an email in the Spam folder is not a spam, how should I do?