+If a `Dcc:' field is encountered, the field will be removed
+before sending the message. The Dcc recipient will receive the
+message as well, but without being mentioned in the recipient
+headers.
+.PP
+In contrast to Bcc, the Dcc recipient receives the
+same original message as all the sighted reciepients, whereas
+the Bcc recipient receives a special, newly constructed message,
+which contains the original message as an attachment.
+.PP
+Bcc is probably a good choice for a message with both sighted
+and invisible reciepients (e.g. inform someone privately about
+the message being sent). Dcc is probably a good choice for
+a message to a group of only invisible recipients (e.g. invite
+to a party).
+.PP