Postfix : relay based on sender address AND recipient address

Posted by Pierre Mourlanne on Server Fault See other posts from Server Fault or by Pierre Mourlanne
Published on 2014-06-03T15:22:18Z Indexed on 2014/06/03 15:29 UTC
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I have configured postfix to relay mails based on the recipient address. In transport I put something like this:

recipientdomain.com        relay:[my.relay.com]

This works fine, when I send an e-mail to [email protected], it does get relayed through my.relay.com. I want to be able to use this relay only when the message comes from a specific address, say [email protected].

Two quick examples:

Mail 1: from [email protected] to [email protected] -> does not get relayed

Mail 2: from [email protected] to [email protected] -> gets relayed

How can I configure Postfix to achieve this?

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