完善信息网络发展商业信函金学富商业信函利用邮政拥有的名址信息资源库和网络优势，已成为社会传播信息的重要媒介，受到社会各界的欢迎。但是随着市场经济向纵深发展，用户对商业信函由单纯追求寄发数量转到要求减少退函和提高回函率上来，在市场经济的大潮中，邮政的信... Improve the development of information network Commercial letter Kim Xue-fu Business Letters using postal address information resources and network advantages, has become an important medium for the dissemination of information by the community, welcomed by all sectors of society. However, as the market economy develops in depth, the number of mail letters sent by the users to the business mailing list is reduced to the requirements of reducing the number of returned letters and increasing the rate of returning letters. In the tide of the market economy, the postal letter ...