Provided by: qmail_1.06-6.2~deb10u1build0.18.04.1_amd64 bug

NAME

       preline - prepend lines to message

SYNOPSIS

       in .qmailext: | preline command

DESCRIPTION

       preline  feeds each incoming mail message through command.  At the top of each message it inserts a UUCP-
       style From_ line, a Return-Path line, and a Delivered-To line.

       preline is useful for procmail and ELM's filter, which do not understand  the  qmail-command  environment
       variables.

OPTIONS

       -d     Do  not  include  the  Delivered-To  line.  You  should  use this option when the recipient of the
              incoming  mail  message  is  actually  under  remote  control,   but   was   sent   here   through
              control/virtualdomains for manual routing.

       -f     Do  not  include  the  From_ line. You should use this option except for commands that create mbox
              files.

       -r     Do not include the Return-Path line.

SEE ALSO

       mbox(5), qmail-command(8)

                                                                                                      preline(1)