Postfix Address Rewriting

[chalex]

Hello,
I'm looking for a hint how to rewrite header_recipient_address by replacing it with envelope_recipient_address for all the messages coming from the particular envelope_sender_address = header_sender_address, for example:

Incoming message:
EHLO domain.com
MAIL FROM:<sender@domain.com>
RCPT TO:<recipient@domain.com>
DATA
Message-Id: <xxxxxxxxxx@domain.com>[U]
To: dummy_address
Subject: Test message
From: sender@domain.com

Modified message, which Postfix should post into the queue:
EHLO domain.com
MAIL FROM:<sender@domain.com>
RCPT TO:<recipient@domain.com>
DATA
Message-Id: <xxxxxxxxxx@domain.com>
To: recipient@domain.com
Subject: Test message
From: sender@domain.com

According to the Postfix FAQ, there is no way to do it with Postfix header_checks because of the following:

65. Using header_checks or body_checks can I make conditional comparisons? Something like, for example:

/^to: joey/ AND /^subject: hot deals/ REJECT

so that certain subjects are blocked only for certain users.

This won't work because Postfix header and body checks can only consider one logical message line at a time. They're meant for simple checks.
If you need anything more sophisticated, you should set up a content filter that has the smarts you need.

Thanks In Advance!

[LMStone]

Not sure why the sending client has an envelope recipient on which you need to filter/rewrite; perhaps you are needing to support legacy domains?

In any event, Postfix Address Rewriting has a great explanation of the various address rewriting methods available in Postfix as well as some tips on when you might use one method over another.

There is also an active Postfix discussion list; since this question is much more about Postfix than Zimbra, you may find some inspiration there as well.

Hope that helps,
Mark

P.S. Note that any changes you make to Postfix outside of using zmlocalconfig will need to be redone after each Zimbra upgrade.