+;; FIXME?
+;; rmail-show-mime-function does not unquote >From lines. Should it?
+(defcustom rmail-mbox-format 'mboxrd
+ "The mbox format that your system uses.
+There is no way to determine this, so you should set the appropriate value.
+The formats quote lines containing \"From \" differently.
+The choices are:
+ `mboxo' : lines that start with \"From \" quoted as \">From \"
+ `mboxrd': lines that start with \">*From \" quoted with another \">\"
+The `mboxo' format is ambiguous, in that one cannot know whether
+a line starting with \">From \" originally had a \">\" or not.
+
+It is not critical to set this to the correct value; it only affects
+how Rmail displays lines starting with \">*From \" in non-MIME messages.
+
+See also `unrmail-mbox-format'."
+ :type '(choice (const mboxrd)
+ (const mboxro))
+ :version "24.4"
+ :group 'rmail-files)
+