随着网络和通讯技术的发展，当今人们已经更加倾向于使用电子邮件来传递信息。在发达国家，电子邮件的地位几乎已经可以和电话相提并论。仅在１９９９年，美国互联网邮件账号猛增了８４％，已经达到５．６９亿。人们已经不再局限于用家里和办公室的某个特定计算机来收发电子邮 With the development of the network and communication technology, people today have been more inclined to use e-mail to transmit information. In developed countries, the status of e-mail can almost be compared with the phone. In 1999 alone, the U.S. Internet mail account surged 84% to 569 million. People are no longer confined to using a particular computer at home and office to send and receive e-mail