SMAPI和CMC都包含在完整的MAPI中，当用户想执行一些高级操作，比如编写自己的E-mail服务器的时候，必须使用完整的MAPI。本文主要阐述如何编写能够收发电子邮件的程序，因此使用SMAPI就足够了-SMAPI and CMC are included in the integrity of the MAPI, when users wish to implement a number of senior operations, For example, the preparation of the E-mail server, it must use the full MAPI. This article is mainly about how to write e-mail procedures, the use of sufficient SMAPI