From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Thu Sep 01 2005 - 18:34:26 CDT

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On Thu, Sep 01, 2005 at 05:59:04PM +0200, amacum.com wrote:

> > What is the purpose of the catchall mailbox? If it is for fetchmail
> > to retrieve the message and revive the original recipients downstream,
> > you need the Postfix 2.x behaviour. Otherwise catchalls are a bad
> > idea, but if you really must have them (without one delivery per
> > original recipient), try:
>
> > enable_original_recipient = no
>
> > With the introduction of DSN (not be confused with DNS) support in
> > Postfix 2.3 (not an official release yet), the above work-around may not
> > be sufficient, so the advice only holds for 2.0, 2.1 and 2.2. I have not
> > investigated how 2.3 behaves with the above setting, or whether there
> > is another way to restore post-rewriting duplicate elimination based
> > solely on the recipient address.
>
> Thank you Victor.
> I Use Postfix 2.2.5 so i will try this setting.
> And yes i need the catchall cause an exchangeserver get the mails,
> checks the header and copy them to the recipients mailbox in the LAN.
>

In that case you MUST stop what you are doing immediately, leave the
multi-drop support in place, and make sure that revived messages are
delivered to X-Original-To: recipients and NEVER to the header To/Cc
recipients. It is critical to understand the difference between the
message envelope envelope and message headers when routing mail.

Consider what happens when you revive a stored mail with
"postfix-userspostfix.org" in the "To:" or "Cc:" line. Consider loss
of mail to "Bcc:" recipients, ...

The Postfix 2.x feature you are trying to turn off is specifically
designed to support multi-drop mailboxes, use it, or rethink how
your mail is processed.

--
        Viktor.

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