"Spam killer" is a term used to describe a tool designed to filter and prevent unwanted spam emails from entering your inbox. Some synonyms for "spam killer" could include "spam filter," "anti-spam software," "spam blocker," "spam detector," "junk mail eliminator," "email protector," or "spam remover." These terms all refer to software or tools that help to keep spam and unwanted emails out of your inbox, which can help to reduce the amount of time spent sorting through and deleting unwanted messages. Whether you're a business owner or personal email user, having an effective spam killer is essential for keeping your inbox organized and efficient.