How is Transfer-Encoding implemented in Exchange 2000 Server?
A9: Routing group boundaries and SMTP target destinations determine how Exchange 2000 Server encodes mail. Exchange 2000 will encode as quoted-printable or 7-bit or Transport-Neutral Encapsulation Format (TNEF) when sending between two servers/recipients in different routing groups, and to the Internet. Exchange 2000 Server will encode in Binary or Summary TNEF when sending to a recipient/server in the same routing group.