Unwanted senders

I think that Zoho would be perfect if I could actually bounce (NOT block) an unwanted sender.
I would also like a notification that a problem sender has been bounced.

Also, I'm not interested in unwanted email going to a spam folder that I would have to periodically clean out.
Spam folder fills quickly in yahoo and hotmail.

I believe that this would discourage unwanted senders that you do not want to hear from.