企业快信的作用是帮助企业解决企业内部、企业与外部沟通难、信息不能及时传播等问题。为此，企业快信系统需要提供有邮件群发、短信群发等功能。-Express letter of the role of the enterprise is to help businesses solve internal, corporate and external communication difficult, not timely dissemination of information and other i