My hatred of spammers

My hatred of spammers increases by the day. The latest trick I’ve seen hitting my mailbox is spam that looks just like message failure reports. Messages from “Mail delivery subsystem” with a subject of “Returned mail: see transcript for details”. This is so annoying. Or would be, but luckily I use SpamAssassin to clean my mailbox for me. Every so often I check the “spam” folder to see what it’s caught, and that’s why I’ve seen all these “Returned mail:” spam. SpamAssassin works; but how long before the spammers get the upper hand…?