header_checks and content_filter documentation misunserstanding?

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header_checks and content_filter documentation ...
\ Stefan Palme (14 Nov 2007)
. \ (Wietse Venema) (14 Nov 2007)
. . \ Stefan Palme (14 Nov 2007)
. . . \ (Wietse Venema) (14 Nov 2007)
. . . . \ Stefan Palme (14 Nov 2007)

2 msg	Some problem configuring postfix/procmail with ...

Subject:	header_checks and content_filter documentation misunserstanding?
Group:	Postfix-users
From:	Stefan Palme
Date:	14 Nov 2007

Hello,

I am using postfix for several years and I am very lucky with it :-)
Just one question regarding the current online documentation: In the
description of "all main.cf parameters" I find the following:

content_filter: ... This setting has a lower precedence than
a content filter that is specified with an access(5) table or
in a header_checks(5) or body_checks(5) table.

I've always thought, that header_checks happens BEFORE queueing a mail,
and content_filter happens AFTER queueing. So in theory, one could
define a header_checks filter that rejects certain mail and lets
others through, while a later content_filter could do more expensive
checks with the mails that came through the header_checks filter.

So actually header_checks and content_filter have no "precedence"
in this sense, because if both are specified, both will be executed
(of course, only if the mail passes the first one).

Am I wrong? I guess I must have misunderstood something...

Thanks and regards
-stefan-

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