Experts predict spam will only get worse, more than doubling by 2007. According to spamfilterreview.com, more than 31 billion emails are sent daily, with 40% of those qualifying as spam. It’s estimated that by 2007, the amount of spam will increase by 63% over current amounts. Annually, individual users receive 2,200 pieces of spam and 16% of all email address changes arise in an effort to escape spam.