http://blogs.msdn.com/pcreehan/archive/2009/01/27/tnef-chapter-2-old-school.aspxAs discussed in Chapter 1 of this captivating series, MAPI contains an interface to allow developers to create and read TNEF data. This interface is the ITnef interface. There are only a few methods in this interface and they are, for the most part, selfenCommunityServer 2.1 SP1 (Build: 61025.2)