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Asked: 2012-03-14 04:28:13 +0800 CST

Change Envelope From to match From header in Postfix

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I am using Postfix as a gateway for my domain and need it to change or rewrite the Envelope From address to match the From header. For example, the From: header is "[email protected]" and the Envelope From is "[email protected]". I want Postfix to make the Envelope From "[email protected]" before relaying it on. I took a look at the Postfix Address Rewriting document but couldn't find anything that matched my use case.

(In case you're curious why I need to do this: Gmail uses the same Envelope From when sending from a particular account, no matter which From: address you choose to use. I would prefer not to disclose the account being used to send the email. Also, it messes with SPF/DMARC domain alignment - see 4.2.2 of the DMARC draft spec.)

email postfix spf g-suite

1 Answers

  1. I believe you want "sender_canonical_maps" (and "recipient_canonical_maps" if you want inbound mail to be translated backwards):

    http://www.postfix.org/postconf.5.html#sender_canonical_maps

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