.PP
.RS 5
.nf
-%components%
+From: Local Mailbox <user@example.com>
+To:
+cc:
+Fcc: +outbox
+Subject:
.fi
.RE
.PP
.PP
.BR From :
.RS 5
-Added by
-.BR post ,
+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
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
+.BR From :
+header MUST exist when the message is sent to
+.BR post,
+otherwise the message will be rejected.
.RE
.PP
.BR Mail\-Reply\-To :