在全球大部分企业中,垃圾邮件已经占到了所有电子邮件总数的40%,它每年给全球商业世界带来的损失高达90亿美元,而且垃圾邮件的数量还在每年成几何级增长,因为对垃圾邮件制造者而言,垃圾邮件已经成为一项有利可图的事业。在垃圾邮件的困扰下,给电子邮件使用者和IT管理者带来了无 Spam accounts for 40% of all emails at most businesses worldwide, causing up to $ 9 billion a year to the global business world, and the volume of spam is growing at a geometric rate each year because Spam has become a profitable business for spammers. Bringing e-mail users and IT managers untoward problems with spam