+This header is filled in by default with the system's idea of the user's local
+mailbox. This can be changed with the
+.B Local\-Mailbox
+profile entry.
+It contains the address of the author or authors (may be more than one if a
+\*(lqSender:\*(rq field is present). For a standard reply (using
+.BR repl ),
+the reply address is constructed by checking the following headers (in this
+order): \*(lqMail-Reply\-To:\*(rq, \*(lqReply\-To:\*(rq, \*(lqFrom:\*(rq,
+\*(lqSender:\*(rq. A \*(lqFrom:\*(rq header MUST exist when the message is
+sent to