Time to add blocking to the mailing list?

I assume others have also seen the junk from [EMAIL PROTECTED] and similar addresses advertising something from http://www.szbookshop.com (though I'm not sure what, since it's in 8 bit characters). I've reported this through SpamCop, but I'm not sure it will do any good. The mail

NEW STOCK PICK: TWLO - AMCG UP 461%..................................................................................................................................................................................... ejes

html head /head body p align=centerfont style=font-size: 11pt face=CourierDid you miss out on AMCG, UP 461%?/font/p p align=centerfont style=font-size: 11pt face=CourierHere's another pick - Another SHORT PLAY/font/p p align=centerba