Definitely not a good idea then
You don't want to accidentally word filter a legitimate email.
Spam should be determined by other factors that I don't quite understand.
( SuperMatt, Wed 27 May 2009, 10:07, archived)

SPAMMY IPs

( WormuIus, Wed 27 May 2009, 10:10, archived)

Well not just that
There's lots of other gubbins to be aware of.
( SuperMatt, Wed 27 May 2009, 10:17, archived)