Specify Remote Client MAPI Support
You can configure a TCP/IP or X.25 X.400 connector to send outbound messages with rich- text characters such as bold, color, and italic. Rich Text Format (RTF) also provides the ability to position attachments. RTF is a feature that should be used only when the recipient client software supports MAPI.
If you do not select the Remote Clients Support MAPI check box, attachments are sent to the foreign system as separate X.400 messages. RTF, icons and their rendering positions, and OLE attachments and their rendering positions are discarded before message transfer. If you select this option and the foreign system does not support MAPI, the foreign system includes an extra attachment called Winmail.dat.
To specify remote client MAPI support: