-If the
-.B \-mbox
-switch is given (the default), then the messages are
-separated using mbox (uucp) style delimiters. This is the format used
-by most mail clients (elm, mailx, etc.).
-.PP
-If the
-.B \-mmdf
-switch is given, then the messages are separated by
-mmdf style delimiters. Each message in the file is separated by four
-CTRL\-A's and a newline.
+The RFC 822 message is converted to the mbox format.
+This is the format used by most mail clients (elm, mailx, etc.).
+For the nitpickers: It's the mboxo format.