The Include/Attach -> option enables you to include an external file in the message you are currently composing. This is one of the most powerful features of the MIME specification. The data in the external file can be of any type. It will be marked with identifying information such that the recipient's mail tool can present the data appropriately. For example, if you include an audio clip and the recipient reads the message with a MIME-capable mail tool, the audio clip will be played through the system's speakers.
There are several options available when adding data from an external file to your message:
When you click the Include/Attach -> option, a cascading menu appears from which you select the inclusion or attachment that you want to include in your message. The figure shows the menus available from the Include/Attach -> option.
The available file type options are: