Really Simple Anti-Spam Idea
A lot of spammers try to get around spam filters by using unusual spellings of terms that humans will recognize but black lists won’t (i.e., “pr0n”).
Perhaps spam filters could capitalize on this and run incoming email through a dictionary. Anything with more than 3 or 4 unrecognizable words gets flagged. Unrecognized terms can be added to the dictionary to help the system develop a more sophisticated vocabulary.
Obviously some innocent people are going to send messages that will be flagged as possible spam, but paying attention to your spell checker before sending out email will help considerable. Technical emails would like prove more of a problem as most dictionaries don’t include a particularly wide range of technical terms in them.