Internet Direct (Indy) Version 9.0.2 Beta
TIdMessage.ContentType
Identifies the MIME media type for the message.

property ContentType: string;
Description
ContentType is a String property that specifies the MIME media type for the message. The purpose of ContentType is to describe the data contained in the body to allow a user agent to determine how to present the data. ContentType contains information about the media type. subtype, and auxillary information in attribute=value notation. SOme common values for the media type and subtype include:

Use ContentTransferEncoding to identify the encoding scheme for the message.