How do I explicitly set the Return-Path to firstname.lastname@example.org in Postfix?
This is a real mailbox for collecting bounces.
At the moment Postfix is automatically setting it to the From field from the email app.
Setting the Return-Path via the email app is no good. Doing so allows the headers to display a correct Return-Path but Postfix won't bounce to it.
I've looked at Flags, Canonical Maps - but not sure what I'm doing here.
I would love an example.