Exchange Server MAPI Client and Collaboration Data Objects 1.2.1 v6.5.8039.0
Exchange Server MAPI Client and Collaboration Data Objects 1.2.1 version 6.5.8039.0 was recently released.
Brief Description
Starting with Exchange 2007, neither the Messaging API (MAPI) client libraries nor CDO 1.2.1 are provided as a part of the base product installation. As a result, there is functionality missing that many applications depend on. Microsoft Exchange MAPI and CDO 1.2.1 provide access to these APIs
Overview
The Messaging API is a COM-like API that provides access to the contents of messaging stores. CDO 1.2.1 (Collaboration Data Objects, version 1.2.1) is a package providing access to Outlook-compatible objects through a COM-based API. Using either CDO or MAPI, a program can connect to a MAPI store, and then perform operations against that store. Starting with Exchange 2007, Microsoft will distribute the MAPI client libraries and CDO 1.2.1 as a Web download.
[UPDATE]
Meanwhile, version 6.5.8067.0 was released:


Sushant Bhosale Says:
December 29th, 2008 at 12:34 am
Hi Rui J.M.Silva,
As you say CDO and MAPI support was not provided or missing at the release of
Exchange 2007, and therefore we cannot do operations like send message , forward message using COM interfaces provided by CDO.
But now we can download Collaboration Data Objects 1.2.1 v6.5.8039.0 releases
and can able to perform task of sending message programatically.
If I ‘m incorrect please correct me and please..please do mail me on :
sushant.sbhosale@rediffmail.com
Thanks,
Sushant.