Associate MIME Types with an Extension

When SMTP sends a MAPI message to an Internet client, all attachments are assigned a content type based on the extension of the attachment file. Use the MIME Types tab to map a new file extension to a specific type of content. You can also define your own MIME types.

To associate a MIME type with an extension:

1. Start System Manager
   On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. In the console tree, double-click Global Settings.
3. Right-click Internet Message Formats, and then click Properties.
4. On the General tab, double-click a content type.
5. To change the content type, in the Type drop-down list, select a new content type.
6. To change the extension, in Associated extension, enter a new file extension. You do not need to include the "." before the extension.
7. To map a new content type to an extension, in the Type drop-down list, select a new content type, and then in Associated extension, enter a new file extension. You do not need to include the "." before the extension.