医药宣传、招生广告、假证假发票……打开电子邮箱,一堆垃圾邮件扑面而来,不慎点进去还可能中招、受骗。方便快捷的电子邮箱怎么变成了垃圾邮件的集散地?垃圾邮件到底暗藏了哪些陷阱?究竟是谁在制造这些烦人的垃圾邮件?信息安全防火墙缘何屡屡失灵?又该如何构筑?这些问题困扰着现代人的生活。触目惊心:每个邮箱年均700多封垃圾邮件2013年一季度,我国电子邮箱用户平均每周收到垃圾邮件的数量为14.6封;用户平均每周收到的邮件中,垃圾邮件所占比例为37.37%。以此推算,每个电子邮箱用户一年要收到750多封垃圾邮件。内容主要包括欺诈赌博、 Medical promotion, ad ad, fake invoices fake ... Open the e-mail, a bunch of junk mail rushed, accidentally click into may also move, cheated. How easy and quick e-mail into a spam distribution center? Spurious spam in the end what the hidden secrets? Who is the manufacture of these annoying junk e-mail? Information security firewall why and how often? These problems plagued the modern Human life. Shocking: More than 700 spam emails per email In the first quarter of 2013, China’s email users received an average of 14.6 spam emails per week. The average number of spam emails received per week was 37.37%. Based on this calculation, each e-mail user receives over 750 spam emails a year. Content mainly includes fraudulent gambling,