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PRELINE(1)		    Double Precision, Inc.		    PRELINE(1)

NAME
       preline - Prepend legacy	mbox headers

SYNOPSIS
       /usr/local/bin/preline {program}	[arg...]

DESCRIPTION
       preline is a wrapper for	program.  preline is usually invoked from
       $HOME/.courier.	preline	runs program, together with any	additional
       arguments specified on the command line.	 program then receives the
       message being delivered,	with some additional headers. The additional
       headers come from the UFLINE, DTLINE, and RPLINE	environment variables.
       These environment variables are initialized by courierdeliver, which
       reads and executes commands from	$HOME/.courier.	These environment
       variables contain additional headers that should	be added to every
       message that's delivered	to a local mailbox.

       preline must be used if program,	that is	executed from $HOME/.courier
       to deliver mail,	does not recognize these environment variables.
       UFLINE contains the From_ line, DTLINE contains the Delivered-To:
       header, and RPLINE contains the Return-Path: header. If these headers
       are not present in the message that the program reads, you may end up
       with excessive resources	being consumed by mail loops or	by
       malfunctioning software which expects to	see From_ lines	in all
       messages	scheduled for local delivery (such as procmail).

EXAMPLE
	   | /usr/local/bin/preline /usr/bin/procmail

       This is the normal way to arrange for procmail to handle	local mail
       delivery.

SEE ALSO
       courierpop3d(8)[1], couriertcpd(8)[2], authlib(7)[3].

AUTHOR
       Sam Varshavchik
	   Author

NOTES
	1. courierpop3d(8)
	   [set	$man.base.url.for.relative.links]/courierpop3d.html

	2. couriertcpd(8)
	   [set	$man.base.url.for.relative.links]/couriertcpd.html

	3. authlib(7)
	   [set	$man.base.url.for.relative.links]/authlib.html

Courier	Mail Server		  02/10/2011			    PRELINE(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | SEE ALSO | AUTHOR | NOTES

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