Recent surveys indicate somewhere between 60 and 85 percent of all email is spam. It amazes most observers when they learn that I receive approximately 400 to 500 such messages most days. As I mentioned in this column a few months ago, SpamSieve (found at www.c-command.com) handles my spam problem with ease and does an admirable job of keeping the inbox clean on my Mac Powerbook. Around the office, however, it