-.B -list
-option produces a listing of the field bodies for header fields with
-names matching the specified component, one per line.
-The listing is numbered, starting at 1, if the
-.B -number
-option is also used.
-A tab character separates the number and the field body.
-The field body is treated as if it is a file name, and only the final
-path name component is listed.
-The complete field body is listed if the
-.B -text
-option is used, the contents of the text are ignored.
+.B \-delete
+mode removes header fields from messages.
+By default, the first header field whose name matches the component
+is deleted.