[SC-Help] How do I block all messages that aren't whitelisted?

[Tames McTigue]

I would have thought this was a common question (and maybe I am blind and 
missing it) but I would like any mail sent to me that isn't in the 
whitelist considered spam and held until I whitelist or report it.

Thanks.

Tames McTigue
tamerz at spamcop.net