(defun define-mail-alias (name definition &optional from-mailrc-file)
"Define NAME as a mail alias that translates to DEFINITION.
This means that sending a message to NAME will actually send to DEFINITION.
-DEFINITION can be one or more mail addresses separated by spaces.
-An address can contain spaces if it is quoted with double-quotes."
+
+Normally, the addresses in DEFINITION must be separated by commas.
+If FROM-MAILRC-FILE is non-nil, then addresses in DEFINITION
+can be separated by spaces; an address can contain spaces
+if it is quoted with double-quotes."
+
(interactive "sDefine mail alias: \nsDefine %s as mail alias for: ")
;; Read the defaults first, if we have not done so.
(sendmail-synch-aliases)