Message Content

There are two possible encodings for the message content: one using MIME, the other using uuencode. MIME is the preferred encoding. In addition, MAPI defines a per-recipient property, PR_SEND_RICH_INFO8AH081, that governs whether or not TNEF information should be included in an outgoing message. So there are a total of four ways of encoding message content:

    MIME with TNEF

    MIME without TNEF

    uuencode with TNEF

    uuencode without TNEF

How to choose MIME or uuencode for outbound messages is not specified.

The following properties are excluded from TNEF: PR_SENDER_*, PR_ATTACH_DATA_*, PR_BODY. All other transmittable message properties are included in the TNEF stream.