随着 Internet 的发展,当前电子邮件已经从科学和教育行业进入了普通家庭,电子邮件传递的信息也从普通文本信息发展到包含声音、图像在内的多媒体信息。电子邮件的廉价和简便的操作在给人们带来巨大便利的同时,也诱使有些人将之作为滥发信息的工具,最终导致了互联网世界中垃圾邮件的泛滥。由于垃圾邮件占据了大量邮箱空间,经常会导致正常的邮件无发投递。笔者 With the development of the Internet, the current e-mail has entered the ordinary home from science and education. The information transmitted by e-mail has also evolved from ordinary text information to multimedia information including sound and images. The cheap and easy operation of e-mail brings great convenience to people and at the same time induces some people to use it as a tool for spamming. This eventually leads to the spread of spam in the Internet world. Spam mail occupy a large amount of mailbox space, often lead to normal mail without delivery. author