The message
from martin contains these words:

checking for an exclamation mark in the subject is good for about 40%

Unfortunately it is likely to catch say, a joke forwarded from a
newsgroup, or genuine e-mails. I did KF !!! and caught something I had
to fish out of packetsave.

--
Rusty Hinge
http://www.users.zetnet.co.uk/hi-fi/