Spammers are forever becoming more creative:
P0RN (zero instead of "O");
P*O*R*N (inserting asterisks) etc.
So it is a never-ending battle but over time I have cut my spam down significantly. You can lock out an entire ISP or lock out a name, "From" "Subject" etc.
--Boris
Bump for P-mail - to my mind, one of the very best spam-killing email clients.