In article <de9253b3-d545-a477-168e-4c1b50ec0cba@xxxxxxxxxxxxxxxxxxxx> you write: >Spam filters are a good example. Poorly chosen spam filters are the >primary reason that email has become so unreliable. Actually, spam is the primary reason that email has become so unreliable. If you did't do spam filtering, however imperfectly, your mailbox would be so awash in junk you couldn't find the trickle of real mail. On my tiny system that handles a dozen users I deal with upwards of 50,000 spam messages a day. I gather that for large commercial systems it's in the billions. R's, John