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From: Wietse Venema (wietseporcupine.org)
Date: Sat Dec 22 2001 - 08:21:18 CST

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    GeneralP.Faultgmx.net:
    > In the previous episode (21.12.2001, 19:03:02), Wietse Venema
    > <wietseporcupine.org> said:
    >
    > > Presently, Postfix does not store the original recipient information.
    > > How would procmail re-create information that is no longer available?
    >
    > i thought of somehow having the alias start a script that starts procmail
    > and passes it's own filename which equals the alias name as an -a argument
    > to procmail > formail writes the additional header line - write access to
    > the mailbox(es) would be the next problem then ...

    You cannot rely on recipient information in the RECEIVED message
    header. Consider mail that has multiple recipients.

    In order to provide X-Envelope-From:, Postfix has to store the
    original recipient information when the mail arrives, so that
    Postfix can prepend the X-Envelope-From: address upon delivery.

            Wietse
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