@example
/usr/local/etc/postfix/master.cf:
nncp unix - n n - - pipe
- flags=FRqhu user=nncp argv=nncp-exec -quiet $nexthop sendmail $recipient
+ flags=Rqhu user=nncp argv=nncp-exec -quiet $nexthop sendmail $recipient
@end example
This runs the @command{nncp-exec} command to place outgoing mail into
Pay attention to @code{flags}, containing @code{R}, telling Postfix to
include @code{Return-Path:} header. Otherwise that envelope sender
-information will be lost. Possibly you will also need somehow to
+information may be lost. Possibly you will also need somehow to
preserve that header on the receiving side, because @command{sendmail}
command will replace it. For example you can rename it before feeding to
@command{sendmail} with
@verbatiminclude sendmail.sh
+Also pay attention that @command{maildrop} does not like @code{From_}
+mbox-style header, so you possibly want:
+
+@example
+mailbox_command = reformail -f0 | maildrop -d $@{USER@}
+@end example
+
@item Specify that mail for @emph{example.com}, should be delivered via
NNCP, to a host named @emph{nncp-host}: