-will generate a unique \*(lqContent-ID:\*(rq for
-each directive; however, the user may override this by defining the ID
-using the \*(lq<\*(rq and \*(lq>\*(rq characters.
+will generate a unique \*(lqContent-ID:\*(rq for each directive,
+corresponding to each message part; however, the user may override
+this by defining the ID using the \*(lq<\*(rq and \*(lq>\*(rq
+characters. The
+.B \-nocontentid
+switch suppresses creation of all \*(lqContent-ID:\*(rq headers,
+even in the top level of the message.